Where to Find Chalcedony in the United States

262 mapped chalcedony spots across 12 U.S. states. Chalcedony is the parent name for microcrystalline quartz, including agate, jasper, carnelian, and chrysoprase. Bluish, waxy, translucent chalcedony is a target across the American West, especially in volcanic country.

Top states for chalcedony

States ranked by number of chalcedony spots in our database. States in bold link to a focused chalcedony-in-state list.

Every chalcedony spot we track

Sorted by state and county. Coordinates open in Google Maps.

Spot	County	Minerals	Coordinates	Access
Black Warrior River Mines & PitsRocky Branch Road	Tuscaloosa County	Agate Chalcedony Fossils Jasper Kyanite Steatite Vivianite	33.2784, -87.3994	Check locally
1 mi. N of old Three-Way drive-in theaterGuthrie Road	Greenlee County	Fire Agate Chalcedony	32.9612, -109.2397	Public
Agua Fria River GravelsNorth Coyote Lakes Parkway	Maricopa County	Agate Chalcedony Jasper	33.6437, -112.3159	Public
New River Area StreamsWest New River Road	Maricopa County	Agate Chalcedony Jasper	33.9194, -112.1047	Public
Area near Meadow Creek Pass	Mohave County	Fire Agate Grape Agate Chalcedony Jasper	34.8971, -114.1838	Public
All along both sides of road from Morristown to Castle Hot SpringsCastle Hot Springs Road	Yavapai County	Agate Chalcedony Chert Jasper Schorl	33.9533, -112.4910	Public
Unnamed Location (Chalcedony/Curtisite)Buchanan Street	—	Chalcedony Curtisite	37.7698, -122.4269	Public
Crescent City BeachesNorth Pebble Beach Drive	Del Norte County	Agate Chalcedony Jasper Moonstone Petrified Wood	41.7650, -124.2309	Public
Castle Butte FoothillsDenise Avenue	Kern County	Agate Chalcedony Chert Jasper Petrified Wood	35.0493, -117.8247	Public
Gem Hill	Kern County	Agate Chalcedony Jasper Uraninite Obsidian	34.9249, -118.2218	Public
Tick CanyonLost Canyon Road	Los Angeles County	Chalcedony Banded Agate Bloodstone	34.4267, -118.3916	Public
Unnamed Location (LA County)Heffner Road	Los Angeles County	Agate Chalcedony Jasper Quartz	34.4367, -118.2229	Public
Area around Goose Lake	Modoc County	Agate Chalcedony Jasper	41.9508, -120.4254	Public
Fandango PassFandango Pass Road	Modoc County	Agate Chalcedony Jasper Quartzite	41.8021, -120.2068	Public
Unnamed Location (Fire Agate)Bradshaw Trail	Riverside County	Chalcedony Fire Agate	33.5080, -114.8241	Public
Eagle Crags	San Bernardino County	Blue Agate Bentonite Calcite Chalcedony Jasper	35.4146, -117.0552	Public
Lead Pipe Spring AreaLead Pipe Spring Road	San Bernardino County	Blue Agate Chalcedony Jasper Opal Thundereggs	35.4665, -117.1665	Public
Trinity RiverBrowns Mountain Road	Trinity County	Chalcedony Gold Jasper Jade Petrified Wood	40.6938, -122.8635	Public
Austin BluffsWittenberg Court	El Paso County	Agate Carnelian Chalcedony Jasper	38.9072, -104.7973	Public
Willow Creek (permission required)West Willow Creek Road	Mineral County	Amethyst Chalcedony Sphalerite Silver Agate	37.8700, -106.9292	Permission
Wolf Creek PassUS 160	Mineral County	Agate Jasper Chalcedony Moonstone	37.4514, -106.8895	Public
Wolf Creek Stream BedUS 160	Mineral County	Amethyst Geodes Agate Chalcedony Jasper Moonstone	37.4873, -106.8203	Public
Unnamed Area (Agatized Coral #2)Interbay Boulevard	Hillsborough County	Agatized Coral Coral Chalcedony Enhydros Fossilized Shells	27.8862, -82.4808	Public
Flor-a-MarTopsail Trail	Pasco County	Agatized Coral Chalcedony	28.2338, -82.7479	Public
Caledesi Causeway BanksHoneymoon Island Trail	Pinellas County	Chalcedony	28.0578, -82.8089	Public
Pinellas & Hillsborough Beaches120th Avenue West	Pinellas County	Agate Carnelian Chalcedony Chert Fossilized Coral	27.7740, -82.7793	Public
Lakeland	Polk County	Chalcedony Silicified Coral	28.1235, -81.8869	Public
Girard	Burke County	Savannah River Agate Chalcedony Quartz Silicified Oolite	33.0663, -81.6460	Public
SummervilleMartha Berry Highway	Chattooga County	Agate Chalcedony Chert Opal	34.4702, -85.3170	Public
RomeCabot Drive Southwest	Floyd County	Chalcedony Geodes Rose Quartz	34.2677, -85.2567	Public
ClarksvilleGA 17	Habersham County	Banded Agate Chalcedony Jasper	34.6138, -83.5628	Public
SpartaL S Ingram Road	Hancock County	Carnelian Chalcedony Jasper	33.2611, -82.9957	Public
Chattahoochee RiverChattahoochee RiverWalk	Muscogee County	Chalcedony Chert Flint Jasper Opal Opalized Wood	32.5140, -84.9962	Public
Lake TchukolahoLakeshore Drive North	Wilkinson County	Agate Jasper Opalite Chalcedony	32.9108, -83.3074	Public
Ada CountySouth Pleasant Valley Road	Ada County	Agate Chalcedony Jasper Petrified Wood Opalized Wood	43.3845, -116.2326	Public
Little Wood River	Blaine County	Agate Chalcedony Jasper	43.3925, -113.9974	Public
Salmon RiverSalmon River Trail #96	Idaho County	Agate Chalcedony Jasper Petrified Wood	45.4632, -115.7870	Public
Parker MountainNational Forest Development Road 68	Lemhi County	Agate Chalcedony	44.6068, -114.5458	Public
Bruneau DesertBalanced Rock Road	Owyhee County	Agate Chalcedony Jasper	42.5729, -115.1896	Public
Grouse Creek	Washington County	Banded Agate Iris Agate Chalcedony	44.3758, -117.1738	Public
Spillman CreekNorth County Road 1540	Hancock County	Geodes Pyrite Chalcedony Sphalerite Quartz	40.6163, -91.2030	Public
KeokukValley Road	Lee County	Keokuk Geodes Calcite Chalcedony Limonite Marcasite Pyrite Sphalerite	40.3875, -91.4518	Public
Muscatine (agate)County Road G44X	Louisa County	Lake Superior Agate Moss Agate Chalcedony Quartz	41.3185, -91.1561	Public
AmesAudubon Trail	Story County	Chalcedony Fossils	42.0336, -93.6318	Public
Medicine Lodge RiverBethel Road	Barber County	Agate Jasper Agatized Wood Chert Chalcedony Petrified Wood	37.0491, -98.4800	Public
McLouthWest Lake Street	Jefferson County	Lake Superior Agate Chalcedony Jasper Petrified Wood	39.1942, -95.2084	Public
Big Blue RiverEast Avenue	Marshall County	Agate Chalcedony Chert Jasper	39.6910, -96.6546	Public
Verdigris River	Wilson County	Agate Jasper Chalcedony Petrified Wood	37.6571, -95.7763	Public
Graves CountyKY 121	Graves County	Agate Chalcedony Chert Jasper Quartz Silicified Wood	36.6705, -88.5417	Public
EddyvillePort Authority Road	Lyon County	Agate Chalcedony Jasper	37.0725, -88.0574	Public
PerryKingsbury Road	Washington County	Analcime Calcite Datolite Malachite Prehnite Agate Amethyst Bloodstone +3 more	45.0165, -67.0774	Public
Deerfield RiverHoosac Road	Franklin County	Jasper Agate Chalcedony	42.5262, -72.6452	Public
MiddlesboroughWalnut Street	Plymouth County	Agate Chalcedony	41.8503, -70.8904	Public
McClain State ParkBear Lake Road	Houghton County	Adularia Chalcedony Chert Jasper Keweenaw Agate Thomsonite	47.2368, -88.6147	Public
Keweenaw Point	Keweenaw County	Keweenaw Agate Adularia Chalcedony Chert Jasper Thomsonite	47.4079, -87.7115	Public
Michigamme MineUS 41;M 28	Marquette County	Chalcedony Hematite Jaspilite	46.5386, -88.0972	Public
Lake Superior BeachLakeshore Road	Ontonagon County	Adularia Keweenaw Agates Chalcedony Chert Jasper Thomsonite	46.8713, -89.3352	Public
Arco MineSlikstone Drive	Crow Wing County	Agates Chalcedony Jasper Binghamite Manganese Iron	46.4891, -94.0019	Public
Portsmouth MinePortsmouth Campground Trail	Crow Wing County	Agates Chalcedony Jasper Binghamite Manganese Iron	46.4908, -93.9714	Public
OsseoElm Creek Boulevard	Hennepin County	Lake Superior Agate Chalcedony Jasper	45.0931, -93.4087	Public
RochesterZumbro River Trail South	Olmsted County	Lake Superior Agate Chalcedony Fossils	43.9970, -92.4930	Public
ElyDavid Dill-Taconite State Trail	Saint Louis County	Jasper Quartz Chalcedony	47.8756, -91.9145	Public
WessonCecil Reeves Road	Copiah County	Banded Agate Chalcedony Petrified Wood	31.7157, -90.3235	Public
LincolnBenton County Northeast 281	Benton County	Chalcedony Chert Mozarkite Galena Jasper	38.3830, -93.2318	Public
GallatinPepper Avenue	Daviess County	Agate Chalcedony Jasper Petrified Wood Fossils	39.9193, -93.9405	Public
HermitageEast Dallas Street	Hickory County	Chalcedony Chert	37.9435, -93.3081	Public
La GrangeWharf Street	Lewis County	Agate Chalcedony Jasper	40.0469, -91.4958	Public
Big Horn CanyonRoute 211	Big Horn County	Agate Chalcedony Jasper Concretions Silicified Coral Fossils	45.3130, -107.9604	Public
Pryor MountainsBad Pass Road	Big Horn County	Fossiles Agate Chalcedony Jasper Petrified Wood	45.2386, -108.2675	Public
Mount BlackmoreBlackmore Trail	Gallatin County	Agate Chalcedony Hyalite Opal Petrified Wood	45.4447, -111.0035	Public
American Bar	Lewis and Clark County	Sapphire Cassiterite Chalcedony Garnet Gold Kyanite Limonite Topaz	46.8131, -111.9292	Public
Missouri RiverDanas Point Drive	Lewis and Clark County	Cassiterite Chalcedony Garnet Gold Kyanite Limonite Sapphire Topaz	46.7284, -111.8746	Public
Jefferson RiverPrimrose Lane	Madison County	Agate Chalcedony Jasper Petrified Wood	45.6902, -112.2745	Public
MinerTom Miner Creek Road	Park County	Agate Chalcedony Jasper Petrified Wood	45.1918, -110.9271	Public
TerryBroadview Bench Road	Prairie County	Petrified Wood Chalcedony Jasper	46.7727, -105.2599	Public
Yellowstone River (Billings area)Highway 312	Yellowstone County	Montana Agate Chalcedony Chert Jasper	45.9054, -108.3174	Public
Platte RiverHuron Drive	Buffalo County	Agate Chalcedony Jasper Petrified Wood	40.6611, -99.0708	Public
Platte Center44 1/2 Road	Butler County	Agate Chalcedony Jasper Silicified Wood	41.3965, -97.3258	Public
Weeping Water156th Street	Cass County	Chalcedony Jasper Fossils	40.8670, -96.1607	Public
ChadronSchommer Road	Dawes County	Chalcedony Blue Chalcedony	42.8713, -103.0211	Public
Dawes County	Dawes County	Chalcedony Celestite Fossils Concretions Agatized Wood Opalized Wood	42.6651, -103.1121	Public
OrellaSugar Loaf Road	Dawes County	Fairburn Agate Jasper Carnelian Opalized Wood Agatized Wood Silicified Ferns Chalcedony	42.9179, -103.4725	Public
ChappellI 80	Deuel County	Fairburn Agate Jasper Chalcedony Opalized Wood Agatized Wood	41.0878, -102.4912	Public
OmahaTwo Rivers Recreation Road	Douglas County	Banded Agate Moss Agate Chalcedony Chert Flint Opal Agatized Wood Opalized Wood	41.2254, -96.3586	Public
FairburyLittle Blue River Trail	Jefferson County	Agate Chalcedony Jasper Petrified Wood	40.1320, -97.1844	Public
Steel CityRomeo Road	Jefferson County	Agate Chalcedony Jasper Petrified Wood	40.0404, -97.0348	Public
Little Nemaha River	Nemaha County	Agate Moss Agate Chalcedony Jasper Petrified Wood	40.4043, -95.8280	Public
WhiteclayElder Drive	Sheridan County	Agate Chalcedony Jasper Petrified Wood	42.9938, -102.5628	Public
Whiteclay (Fairburn area)	Sheridan County	Fairburn Agate Jasper Chalcedony Opalized Wood Agatized Wood Fossils	42.9960, -102.6282	Public
Agate Fossil BedsRiver Road	Sioux County	Agate Jasper Chalcedony Fossils Opalized Wood Agatized Wood	42.4366, -103.7359	Public
Sioux CountyGlen Road	Sioux County	Chalcedony Celestite Fossils Concretions Agatized Wood Opalized Wood	42.5887, -103.5953	Public
Lahontan ReservoirKaren Road	Churchill County	Agate Chalcedony Jasper Petrified Wood	39.4476, -119.0493	Public
HendersonMcCullough Hills Trail	Clark County	Chalcedony Jasper Onyx	35.9740, -115.0574	Public
Valley of Fire State ParkBitter Springs Trail	Clark County	Wonderstone Chalcedony	36.3981, -114.6937	Public
Montezuma Peak	Esmeralda County	Chalcedony Chert Jasper Quartz Obsidian Opalized Wood	37.6626, -117.3611	Public
Veterans Memorial HighwayVeterans Memorial Highway	Esmeralda County	Agate Petrified Wood Chalcedony	38.0251, -117.7848	Public
Agate Point	Humboldt County	Agate Chalcedony Chert Flint Jasper	41.7504, -118.3357	Public
Golconda (petrified area)Eden Valley Road	Humboldt County	Chalcedony Petrified Wood	40.9787, -117.4834	Public
Virgin Valley	Humboldt County	Agate Chalcedony Chert Flint Jasper Opal Silicified Lignite Opalized Wood +1 more	41.8302, -119.0002	Public
Lander CountyBattle Mountain Road	Lander County	Chalcedony Jasper Opal Opalite	39.8858, -117.1130	Public
PanacaUvada Road	Lincoln County	Chalcedony Chert Flint	37.7605, -114.3674	Public
Walker Lake	Mineral County	Agate Chalcedony Fossils Petrified Wood Turquoise	38.7849, -118.7425	Public
Bergen CountySoldier Hill Road	Bergen County	Agate Amethyst Carnelian Chalcedony Datolite Natrolite Common Opal Fire Opal	40.9654, -74.0542	Public
Cape MayCape May Promenade	Cape May County	Quartz Chalcedony	38.9306, -74.9112	Public
Pompton LakesI 287	Passaic County	Banded Agate Amethyst Barite Calcite Chalcedony Cuprite Datolite Dolomite +7 more	41.0054, -74.3071	Public
Prospect Park QuarryNorth 16th Street	Passaic County	Banded Agate Amethyst Barite Calcite Chalcedony Cuprite Datolite Dolomite +7 more	40.9404, -74.1748	Public
Union CountyValley Road	Somerset County	Agate Apophyllite Albite Bornite Chalcedony Datolite Galena Hematite +1 more	40.6602, -74.4091	Public
Warren TownshipRed Hill Road	Somerset County	Banded Agate Moss Agate Chalcedony Jasper Petrified Wood Quartz Amethyst Citrine +1 more	40.6298, -74.5312	Public
Rio Puerco Valley	Bernalillo County	Agate Chalcedony Jasper Opalized Wood Agatized Wood	35.0755, -106.9489	Public
Luna (agate area)Bill Knight Gap Road	Catron County	Agate Chalcedony Jasper Quartz	33.8189, -108.9548	Public
MogollonBursum Road	Catron County	Agate Chalcedony Jasper Fluorite	33.3899, -108.8022	Public
QuemadoUS 60	Catron County	Agate Chalcedony Jasper Agatized Wood	34.3416, -108.4927	Public
Zuni MountainsCounty Road 149	Cibola County	Agate Chalcedony Jasper Petrified Wood	35.1422, -108.3258	Public
Hatch	Doña Ana County	Agate Chalcedony Jasper Quartz	32.7108, -107.1072	Public
Pyramid Mountains	Hidalgo County	Agate Chalcedony Jasper	32.1946, -108.7222	Public
Cookes Peak areaCookes Peak Trail	Luna County	Agate Carnelian Chalcedony Jasper Fluorite	32.5260, -107.7014	Public
General Area (Luna County)	Luna County	Agate Chalcedony Chert Jasper	32.3316, -107.7059	Public
Pedernal Park	Rio Arriba County	Agate Chalcedony Chert Jasper	36.1920, -106.4898	Public
Blanco Trading PostState Highway 57	San Juan County	Chalcedony	36.3467, -107.8253	Public
Nacimiento MountainsEureka Mesa Road	Sandoval County	Agate Azurite Chalcedony Chrysocolla Malachite	35.9988, -106.8941	Public
Mount ChalchihuitlGravel Pit Road	Santa Fe County	Agate Chalcedony Petrified Wood Turquoise	35.4701, -106.1126	Public
Turquoise Hill and surrounding areaBonanza Creek Road	Santa Fe County	Agate Chalcedony Chert Jasper	35.5135, -106.0956	Public
Elephant ButteNM 51	Sierra County	Agate Chert Chalcedony Jasper	33.1729, -107.0448	Public
Jornada ValleyUpham Road	Sierra County	Agate Chalcedony Elixirite Jasper Petrified Wood	33.1363, -107.0245	Public
Mimbres MountainsTrail #135	Sierra County	Agate Chalcedony Chert Chrysocolla Jasper Fluorite	32.8441, -107.7360	Public
Pee Dee River	Anson County	Agatized Wood Chalcedony Jasper	35.1071, -80.0563	Public
DemocratBig Ivy Drive	Buncombe County	Chalcedony Feldspar Garnet Moonstone Olivine Vermiculite	35.7865, -82.5007	Public
ConcordShadowcrest Drive Southwest	Cabarrus County	Agate Carnelian Chalcedony Common Opal	35.3619, -80.6279	Public
Cape Fear River and tributariesHijacked	Cumberland County	Agate Chalcedony Chert Jasper Common Opal Agatized Wood	35.1012, -78.8569	Public
Cumberland CountyFreedom Lane	Cumberland County	Agate Chalcedony Chert Jasper Common Opal Agatized Wood	34.9592, -78.9394	Public
Creedmore	Granville County	Agate Jasper Chalcedony	36.2075, -78.6571	Public
Higdon MountainForest Drive	Macon County	Actinolite Chalcedony Chromite Corundum Enstatite Magnetite Opal Quartz +5 more	35.1484, -83.2907	Public
CaldwellBailey Road	Mecklenburg County	Agate Carnelian Chalcedony	35.4655, -80.8270	Public
DanburySheppard Mill Road	Stokes County	Agate Carnelian Chalcedony Jasper Hyalite Opal Hematite Amethyst	36.4083, -80.2000	Public
TraphillTraphill Mill Road	Wilkes County	Moss Agate Jasper Chalcedony	36.3356, -81.0321	Public
MedoraI 94	Billings County	Agate Chalcedony Silicified Wood Concretions	46.9233, -103.4921	Public
BismarkGallatin Loop	Burleigh County	Agate Chalcedony Silicified Wood Jasper	46.7597, -100.8355	Public
Hettinger CountyState Highway 8	Hettinger County	Agate Chalcedony Silicified Wood Jasper Selenite	46.5117, -102.3170	Public
TappenHighway 10	Kidder County	Agate Chalcedony Jasper Fossils	46.8796, -99.4569	Public
Souris RiverRiver Road North	McHenry County	Quartz Agate Chalcedony Jasper Fossils	48.1150, -100.8019	Public
MandanSunny Place South	Morton County	Agate Chalcedony Chert Teredo Petrified Wood	46.8174, -100.9353	Public
Turtle MountainBia 23	Rolette County	Quartz Agate Chalcedony	48.8155, -99.9217	Public
Cannonball River	Sioux County	Agate Chalcedony Silicified Wood Jasper	46.3596, -100.9431	Public
DickinsonLehigh Road	Stark County	Agate Chalcedony	46.8706, -102.6924	Public
Richardton42nd Street Southwest	Stark County	Agate Chalcedony Agatized Wood Jasper Selenite	46.8031, -102.3097	Public
Flint RidgeFlint Ridge Road Southeast	Licking County	Agate Amethyst Carnelian Chalcedony Chert Flint Jasp-agate Jasper +2 more	39.9897, -82.2652	Public
Licking & Muskingum CountiesSummit Road Southeast	Licking County	Flint Chalcedony Quartz	40.0504, -82.3879	Public
Muskingum CountyI 70	Muskingum County	Agate Amethyst Carnelian Chalcedony Chert Flint Jasp-agate Jasper +2 more	39.9595, -81.9348	Public
BuffaloUS 64;US 183	Harper County	Agate Chalcedony Chert Jasper	36.8499, -99.6278	Check locally
AlvaN2445 Road	Woods County	Banded Agate Moss Agate Chalcedony Chert Jasper	36.7842, -98.6551	Check locally
Shirttail CreekShirttail Creek Road	Baker County	Agate Chalcedony Jasper Oregon Jade Agatized Wood	44.5176, -117.4194	Check locally
Clear CreekClear Creek Road	Columbia County	Plume Agate Carnelian Jasper Chalcedony	45.8006, -123.2889	Check locally
Bear Creek	Crook County	Moss Agate Chalcedony Drusy Quartz	44.0724, -120.7454	Check locally
Carey Agate BedsMaury Road	Crook County	Agate Chalcedony Jasper	44.0330, -120.4185	Check locally
White RockWhite Rock Spring Road	Crook County	Thundereggs Agate Chalcedony Opal	44.4245, -120.5465	Check locally
N Umpqua RiverSmith Springs Lane	Douglas County	Agate Chalcedony Carnelian Jasper Petrified Wood Silicified Wood	43.2977, -122.9391	Check locally
S Umpqua RiverAmber Lane	Douglas County	Agate Chalcedony Carnelian Jasper Petrified Wood Silicified Wood	43.1649, -123.3945	Check locally
Warm Springs Reservoir	Harney County	Agate Chalcedony Jasper Petrified Wood Black Agate	43.6216, -118.2435	Check locally
Green Springs Mt.32-3-32.1	Jackson County	Agate Nodules Carnelian Chalcedony Jasper	42.1317, -122.5104	Check locally
AshwoodNortheast Trout Creek Road	Jefferson County	Agate Chalcedony Geodes Jasper Thundereggs	44.7358, -120.7542	Check locally
Priday Agate BedsNortheast Pony Butte Road	Jefferson County	Agate Chalcedony Jasper Opal Thundereggs	44.7373, -120.9073	Paid / fee
WillowdaleThe Dalles-California Highway	Jefferson County	Agate Chalcedony Geodes Jasper Thundereggs	44.8038, -120.9424	Check locally
Streams around Oregon CavesCaves Highway	Josephine County	Agate Chalcedony Gold Jasper Petrified Wood Rhodonite	42.1077, -123.4085	Check locally
Quartz Mountain PassForest Road 3660	Lake County	Agate Chalcedony Jasper	42.3234, -120.8119	Check locally
West Side Warner Peak	Lake County	Agate Chalcedony Geodes Jasper Opal Thundereggs	42.4672, -119.7819	Check locally
Agate BeachNorthwest Cherokee Lane	Lincoln County	Agate Moonstone Jasper Chalcedony	44.6651, -124.0594	Check locally
Beach Area NewportSouthwest Arbor Drive	Lincoln County	Agate Moonstone Jasper Chalcedony	44.5935, -124.0680	Check locally
Beach Area YachatsYachats Ocean Road	Lincoln County	Agate Chalcedony Jasper Moonstone Geodes	44.3067, -124.1045	Check locally
BroganJohn Day Highway	Malheur County	Agate Chalcedony Chert Jasper Petrified Wood	44.2320, -117.5106	Check locally
Ironside and Malheur Reservoir	Malheur County	Agate Chalcedony Chert Jasper Petrified Wood	44.3624, -117.6981	Check locally
Succor Creek General Area	Malheur County	Agate Chalcedony Chert Jasper Opalized Wood	43.3600, -117.1093	Check locally
AntelopeAntelope Highway	Wasco County	Agate Chalcedony Geodes Jade Jasper	44.9081, -120.7385	Check locally
WatersideOld Mill Road	Bedford County	Calcite Chalcedony Chert	40.1712, -78.3936	Public
Alsace TownshipSeidel Road	Berks County	Chalcedony Jasper Agate	40.3670, -75.8656	Public
FeastervilleOld Lincoln Highway	Bucks County	Sunstone Agate Feldspar Chalcedony Chert Silicified Wood	40.1530, -74.9537	Public
PhiladelphiaBoy Scout Bridge	Delaware County	Agate Petrified Wood Chalcedony Chert Jasper Quartz	40.0130, -75.3895	Public
BridgeportRiver Road	Montgomery County	Calcite Chalcedony Dolomite Goethite Jasper Malachite Quartz Sphalerite	40.0987, -75.3272	Public
DerryMill Street	Westmoreland County	Quartz Chalcedony Jasper	40.3488, -79.2681	Public
HarrisburgPleasant View Road	York County	Agate Amethyst Chalcedony Andradite Garnet Opal Quartz Silicified Wood	40.1651, -76.8443	Public
Cumberland HillWoonsocket Industrial Highway	Providence County	Agate Chalcedony Jasper Quartz	41.9803, -71.4856	Public
ProvidenceWoonasquatucket River Greenway	Providence County	Agate Chalcedony Jasper Quartz	41.8241, -71.4616	Public
Clearwater & Herse ValleyWeeping Willow Lane	Aiken County	Amethyst Chalcedony Ilmenite Monazite Quartz Smoky Quartz Rutile Zircon	33.5384, -81.8239	Public
Myrtle BeachMyrtle Beach Boardwalk	Horry County	Agate Chalcedony Quartz Fossilized Shark Teeth Megalodon Teeth	33.6879, -78.8822	Public
ArdmoreEast Ardmore Road	Fall River County	Fairburn Agates Agatized Wood Jasper Chalcedony Rose Quartz	43.0107, -103.4691	Public
Camp CrookSD Highway 20	Harding County	Moss Agate Chalcedony	45.5525, -103.9650	Public
InteriorBen Reifel Road	Jackson County	Jasper Chalcedony Agate	43.7320, -101.9454	Public
Spearfish CanyonUS Highway 14A	Lawrence County	Amethyst Geodes Chalcedony Silicified Wood	44.3470, -103.9244	Public
Whitewood CreekWhitewood Valley Road	Lawrence County	Amethyst Geodes Chalcedony Silicified Wood	44.5465, -103.5639	Public
Oglala	Oglala Lakota County	Agate Chalcedony Jasper	43.2963, -102.9105	Public
Red ShirtTatanka Numpa Road	Oglala Lakota County	Agate Chalcedony Jasper	43.6741, -102.8991	Public
JellicoUS 25W	Campbell County	Agate Chalcedony Jasper	36.5512, -84.0692	Public
LawrenceburgUS 64	Lawrence County	Chert Chalcedony Geodes	35.2315, -87.3733	Public
General AreaCalamity Creek Road	Brewster County	Moss Agate Plume Agate Chalcedony Jasper Quartz	30.1676, -103.5948	Public
Terlingua CreekJoe Moss Road	Brewster County	Amber Agate Chalcedony Jasper	29.2906, -103.5475	Public
W side of Glass Mountains	Brewster County	Moss Agate Plume Agate Chalcedony Jasper Quartz	30.3704, -103.4002	Public
Quitman Mountains (South)	Hudspeth County	Agate Amethyst Carnelian Chalcedony Jasper Petrified Wood	31.1005, -105.5080	Public
Marfa and Ft. DavisTX 17	Jeff Davis County	Agate Chalcedony Jasper	30.4511, -103.9821	Public
H.D. House Ranch areaTX 72	Live Oak County	Agatized Fern Buds Jasper Chalcedony	28.4665, -98.2258	Public
Eagle PassStone Hill	Maverick County	Agate Amber Chalcedony Jasper	28.7373, -100.4712	Public
Chinati Mts	Presidio County	Agate Chalcedony Jasper	30.0004, -104.3529	Public
Hinton CreekCo 364	San Saba County	Chalcedony Chert	31.0145, -99.0645	Public
Rio Grande	Starr County	Agate Chalcedony Jasper	26.3624, -98.8352	Public
Btwn Groveton & Trinity	Trinity County	Agate Chalcedony Jasper Petrified Wood	31.0331, -95.2220	Public
Rio Grande River AreaRio Grande Vega Trail	Webb County	Agate Agatized Wood Chalcedony Jasper	27.4979, -99.4922	Public
LopenoEl Tigre Road	Zapata County	Agate Agatized Wood Chalcedony Jasper	26.7131, -99.1313	Public
Cedar Mountain areaGreen River Cutoff	Emery County	Agate Anhydrite Carnotite Chalcedony Jasper Gypsum Uraninite	39.1599, -110.6158	Public
San Rafael RiverHatts Ranch Road	Emery County	Agate Anhydrite Carnotite Chalcedony Gypsum Jasper Selenite Sulfur	38.9018, -110.3749	Public
San Rafael Swell	Emery County	Agatized Wood Amethyst Carnotite Petrified Wood Agate Chalcedony Chert Petrified Dinosaur Bones +1 more	38.9221, -110.5309	Public
WoodsideDinosaur Diamond Prehistoric Highway	Emery County	Agate Carnotite Chalcedony Chert Petrified Dinosaur Bone Jasper Silicified Wood	39.2016, -110.3346	Public
Circle Cliffs	Garfield County	Agate Chalcedony Jasper Petrified Wood Silicified Wood	37.9962, -111.1291	Public
AgateCR 179	Grand County	Agate Chalcedony Chert Jasper Opal Opalized Wood Quartz	39.0176, -109.2472	Public
Colorado RiverDinosaur Diamond Prehistoric Highway	Grand County	Agate Chalcedony Chert Jasper Opal Opalized Wood Quartz	38.6027, -109.5841	Public
Miner's BasinMiners Basin Road	Grand County	Actinolite Calcite Chalcedony Chrysocolla Chalcopyrite Fluorite Hematite Malachite +3 more	38.5456, -109.2816	Public
SE Grand County	Grand County	Agate Chalcedony Chert Silicified Dinosaur Bone Petrified Wood	38.6512, -109.5572	Public
Cedar CityCedar Canyon Road	Iron County	Agate Moss Agate Chalcedony Jasper Petrified Wood	37.6512, -112.9749	Public
Granite MountainIron Springs Road	Iron County	Actinolite Albite Amethyst Azurite Apatite Barite Chalcedony Cinnabar +5 more	37.7340, -113.2350	Public
Drum MountainsRough Well Road	Juab County	Agate Jasper Pyrolusite Rhodochrosite Chalcedony Chalcopyrite Cuprite Galena +6 more	39.5711, -113.0359	Public
Dugway Range	Juab County	Beryl Chalcedony Fluorite Garnet Topaz	39.8944, -113.0802	Public
Spor MountainEagle Rock	Juab County	Fluorite Bertrandite Carnotite Chalcedony Chalcopyrite Hematite Magnetite Pyrite +1 more	39.7588, -113.1974	Public
Thomas Range	Juab County	Agate Beryl Chalcedony Fluorite Garnet Opal Quartz Topaz	39.7211, -113.1351	Public
Topaz Dome Quarry	Juab County	Beryl Calcite Bixbyite Carnelian Carnotite Chalcedony Fluorite Garnet +5 more	39.6966, -113.0987	Public
Kitchen Corral Wash	Kane County	Barite Calcite Chalcedony Limonite Pyrolusite	37.1358, -112.0934	Public
Dog Valley	Millard County	Chalcedony Fluorite	38.6648, -112.5798	Public
Little Drum Mountains	Millard County	Azurite Cuprite Chalcedony Chalcopyrite Malachite Pyrite Pyrolusite Rhodochrosite +1 more	39.4625, -113.0303	Public
Sevier Lake	Millard County	Chalcedony Galena Garnet Molybdenite	39.0166, -113.2891	Public
Henry mining districtFlat Top Road	Sevier County	Hematite Limonite Pyrolusite Magnetite Thorium Fluorite Apatite Albite +8 more	38.5246, -112.2399	Public
Clifton mining district	Tooele County	Agate Azurite Dolomite Malachite Garnet Rutile Bornite Calcite +6 more	40.1710, -113.8127	Public
Dugway mining district	Tooele County	Agate Amethyst Apatite Fluorite Chalcedony Garnet Topaz Cerussite +7 more	39.9975, -113.1860	Public
Sweet Water CanyonBitter Creek Road	Uintah County	Agate Chalcedony Jasper Petrified Wood	39.8397, -109.4128	Public
FairfieldLewiston Road	Utah County	Chalcedony Chert Limonite Pyrite Quartz Variscite Fossils	40.2736, -112.1452	Public
Elk CreekCarsonville Road	Grayson County	Chalcedony	36.7182, -81.1485	Public
CentraliaEast Carson Street	Lewis County	Agate Carnelian Chalcedony Geodes Jasper Petrified Wood	46.7461, -122.9415	Public
DotyDoty Street	Lewis County	Agate Carnelian Chalcedony Geodes Jasper Petrified Wood	46.6425, -123.2800	Public
Lucas CreekSenn Road	Lewis County	Agate Carnelian Chalcedony Geodes Jasper Petrified Wood	46.6389, -122.7723	Public
Pe EllJones Road	Lewis County	Agate Carnelian Chalcedony Geodes Jasper Petrified Wood	46.5737, -123.3035	Public
Green CreekGreen Creek Road	Pacific County	Agate Carnelian Chalcedony Jasper	46.5883, -123.6151	Public
LebamLebam Road	Pacific County	Agatized Fossil Shells Chalcedony	46.5635, -123.5648	Public
Long BeachDiscovery Trail	Pacific County	Agate Chalcedony Quartz	46.3608, -124.0643	Public
Ocean ParkBay to Ocean Trail	Pacific County	Agate Chalcedony Quartz	46.4924, -124.0587	Public
Mt. AdamsPacific Crest Trail	Skamania County	Agate Carnelian Chalcedony Jasper Quartz	46.2359, -121.5474	Public
Knobly Mountain	Mineral County	Chalcedony Calcite Dolomite Fluorite Sulfur Quartz Sphalerite	39.3459, -79.0029	Public
Laramie Mountains	Albany County	Agate Chalcedony Jasper	41.5733, -105.5009	Public
Moss Agate HillSpring Canyon Road	Converse County	Moss Agate Chalcedony Jasper	42.6405, -105.6848	Public
Atlantic CityRiverview Cutoff	Fremont County	Agate Chalcedony Gold Nephrite Jade Jade Jasper Muscovite Quartz +3 more	42.4895, -108.7275	Public
Fort Washakie	Fremont County	Moss Agate Chalcedony Jasper	43.1318, -108.9788	Public
Fremont CountyContinental Divide National Scenic Trail	Fremont County	Agate Chalcedony Jasper	42.5377, -108.9406	Public
Sage Hen Creek	Fremont County	Agate Chalcedony Jasper	42.5813, -107.5826	Public
Warm SpringsEmigrant Trail	Fremont County	Agate Chalcedony Jasper Jade Nephrite Jade Quartz Silicified Wood	42.4908, -108.1721	Public
Wind River & StreamsCountry Club Drive	Fremont County	Agate Chalcedony Jasper	43.0180, -108.4526	Public
Buffalo	Johnson County	Agate Chalcedony Gastroliths Jasper Petrified Wood Quartz	44.4527, -106.5548	Public
KemmererEmigrant Trail	Lincoln County	Turritella Agate Chalcedony Chert Jasper Quartz Petrified Wood Silicified Wood	41.8114, -110.4780	Public
Granite Mountains	Natrona County	Chalcedony	42.4717, -107.1796	Public
Poison Spider Creek	Natrona County	Agate Chalcedony Jasper	42.8202, -106.5635	Public
HartvilleLakeside Road	Platte County	Agate Moss Agate Chalcedony	42.3221, -104.7482	Public
Farson	Sweetwater County	Agate Chalcedony Chert Jasper Quartz Silicified Wood	42.1694, -109.4311	Public
Green River	Sweetwater County	Agate Chalcedony Jasper Silicified Wood	41.5167, -109.7124	Public
Red DesertTipton-North Road	Sweetwater County	Agate Chalcedony Chert Jasper Quartz Silicified Wood	41.8194, -108.2799	Public
Rock Springs	Sweetwater County	Agate Chalcedony Chert Jasper Quartz Silicified Wood	41.6163, -109.1605	Public
Steamboat Mountain	Sweetwater County	Agate Chalcedony Jasper Petrified Wood	41.9624, -108.9657	Public
Sweetwater CountyWY 374	Sweetwater County	Agate Chalcedony Chert Jasper Petrified Wood Silicified Wood Quartz Turritella Agate	41.5388, -109.4846	Public
Blacks Fork Creek	Uinta County	Silicified Algae Turritella Agate Chalcedony Jasper Quartz Petrified Wood	41.5683, -110.1414	Public
Worland	Washakie County	Agate Chalcedony Red Jasper Yellow Jasper Quartzite	43.9624, -107.8925	Public

Chalcedony rockhounding FAQ

Where is the best place to find chalcedony in the U.S.?+

Utah, Oregon, Wyoming have the highest concentrations of chalcedony in this list. Each state's quality and access varies — open the linked state pages for a detailed view.

How many chalcedony rockhounding spots does RockHoundR track?+

262 mapped spots across 12 states. The app keeps these on a map alongside your private finds.

Can I legally collect chalcedony on public land?+

Casual hand collecting of common rocks and minerals like chalcedony is allowed on most BLM and U.S. Forest Service land, with daily and annual limits set by the local field office. National parks, most state parks, and tribal land are off-limits. Always check with the managing agency before a trip.

How do I identify chalcedony in the field?+

Field identification of chalcedony comes down to color, hardness, fracture, and luster. The RockHoundR app links to geology details for each spot to help narrow down what you might be picking up.

Hunt chalcedony on the map

Open RockHoundR to see these spots on a real map with public land overlays and trip-planning details.