C&D Canal (New Castle)
Belemnites, shark teeth, and shell on the dredge spoil banks near Reedy Point and St. Georges, where the Corps of Engineers allows hand collecting. The Delaware Geological Survey publishes a guide to the site.
Rockhounding in Delaware
Updated July 2026
13 mapped spots for rock hunting and rock collecting across 3 counties. Delaware rockhounding is the Chesapeake and Delaware Canal, where the spoil banks near Reedy Point give up Cretaceous belemnites, the state fossil, plus shark teeth and shell, and the Delaware Bay beaches from Bowers and Slaughter Beach to Cape Henlopen, which collect quartz and jasper pebbles and the occasional fossil. The Piedmont corner adds sillimanite, the state mineral, near Brandywine Springs.
Where is the best rockhounding in Delaware?
The best rockhounding in Delaware is at Cape Henlopen in Sussex County (quartz), Fowler Beach in Sussex County (quartz), and Chesapeake & Delaware Canal in New Castle County (fossil). In total, 13 mapped collecting spots across 3 counties produce quartz, fossil, and sillimanite, each listed below with its land access.
Every rockhounding spot in Delaware
Best spotSlaughter BeachSussex County, DelawarePermission required · Quartz, Jasper
Best spotBowers BeachKent County, DelawarePublic access · Quartz
Best spotCape HenlopenSussex County, DelawarePermission required · Quartz
Best spotChesapeake & Delaware CanalNew Castle County, DelawarePublic access · Fossil
Best spotCoursey PondKent County, DelawarePermission required · Fossil
Best spotFowler BeachSussex County, DelawarePublic access · Quartz
Best spotKillen PondKent County, DelawarePermission required · Fossil
Best spotNear Brandywine Springs State ParkNew Castle County, DelawarePermission required · Sillimanite
Best spotPepper CreekSussex County, DelawarePublic access · Fossil
Best spotPickering BeachKent County, DelawarePublic access · Quartz
Deauville BeachSussex County, DelawarePublic access · Quartz- Hoopes ReservoirNew Castle County, DelawarePublic access · Sillimanite
- LaurelSussex County, DelawarePublic access · Iron Ore
Delaware rockhounding photos
Representative spot and material photos from locations in this state, shown where verified public image records are available.
Top minerals found in Delaware
Counts reflect how many spots in this list mention each mineral.
Notable areas: C&D Canal belemnites and shark teeth, Delaware Bay beach jasper, Brandywine Springs sillimanite, and Iron Hill jasper are the Delaware targets collectors travel for.
Geology behind Delaware rockhounding
Delaware's northern tip in New Castle County is Piedmont: Wissahickon schist and gneiss with sillimanite, garnet, and quartz around Brandywine Springs and Hoopes Reservoir, and Iron Hill near Newark, a gabbro body capped with iron ore and jasper mined from 1701. Everything south of the Fall Line is Coastal Plain. The Cretaceous Mount Laurel and Navesink formations, exposed when the C&D Canal was dug, carry belemnites, oysters, shark teeth, and occasional mosasaur material, and the Corps of Engineers spoil banks near Reedy Point and St. Georges remain the public collecting ground. Kent and Sussex counties are Miocene and younger sand and gravel, and their ponds, creeks, and bay beaches (Coursey Pond, Killen Pond, Pepper Creek, Bowers Beach, Pickering Beach, Slaughter Beach, Fowler Beach, Cape Henlopen) turn up quartz, jasper, and chert pebbles and washed-out fossils.
Best regions to focus your search
Delaware Bay beaches (Kent, Sussex)
Quartz and jasper pebbles and occasional fossils at Bowers, Pickering, Slaughter, and Fowler beaches and Cape Henlopen. Public beaches allow surface picking; state park rules apply at Cape Henlopen.
Piedmont corner (New Castle)
Sillimanite and garnet in the schist around Brandywine Springs and Hoopes Reservoir, iron ore and jasper at Iron Hill. Parks and reservoir land are look-only; private ground needs permission.
Kent and Sussex ponds and creeks
Gravel quartz, jasper, and chert at Coursey Pond, Killen Pond, and Pepper Creek, at public accesses and with landowner permission.
Best season
Year-round on the canal banks, best after rain washes the spoil and in cool months when the ticks and greenhead flies are down. Bay beaches are best from November through March after storms and on falling tides. Summer is hot and buggy on the marsh edges.
What to bring
A trowel, a small screen, and zip bags for the canal spoil; a sand scoop and mesh bag for the beaches; a hand lens; tick and fly protection; a tide table. Stay well back from the canal's edge and out of the shipping channel's riprap.
Local collecting history
Iron Hill's ore was mined from 1701, one of the earliest iron works in the colonies. The C&D Canal, opened in 1829 and enlarged repeatedly, exposed the Cretaceous beds that made the belemnite the state fossil in 1996. Sillimanite from Brandywine Springs became the state mineral in 1977.
Rockhounding near major Delaware cities
Day-trip range. Each section lists the closest mapped rockhounding spots within about 150 miles of the city. Most are inside a 2 to 3 hour drive.
Rockhounding near Wilmington
See all →6 closest spots to Wilmington, DE.
- Near Brandywine Springs State ParkNew Castle County · Sillimanite5 mi6 min drive
- Hoopes ReservoirNew Castle County · Sillimanite6 mi7 min drive
- East Branch Naamanm CreekDelaware County · Sphene, Quartz8 mi10 min drive
- Brandywine CreekChester County · Amethyst9 mi11 min drive
- Chester CreekDelaware County · Amethyst, Smoky Quartz10 mi13 min drive
- UplandDelaware County · Geode, Amethyst13 mi16 min drive
Neighboring states with rockhounding
Geology rarely respects state borders. These states share mapped rockhounding country with Delaware, useful when Delaware is the start, not the whole trip. Each card links to the closest county across the line.
Pennsylvania90 spotsClosest: Delaware County · ~17 mi New Jersey72 spotsClosest: Gloucester County · ~20 mi Maryland43 spotsClosest: Worcester County · ~24 mi Virginia93 spotsClosest: Loudoun County · ~110 mi New York92 spotsClosest: Orange County · ~134 mi West Virginia41 spotsClosest: Morgan County · ~139 mi Connecticut55 spotsClosest: Western Connecticut Planning Region · ~157 mi
Rockhounding by county in Delaware
County pages are linked once we have at least 3 mapped spots for a focused guide with coordinates, mineral notes, and nearby spots.
Top picks in Delaware
10 best spotsHand-picked standouts from the Delaware list, chosen for unusual mineralogy, documented public access, or both. Each card links to coordinates, access notes, and what to look for.
- Top pick
Cape Henlopen
PermissionSussex County
Cape Henlopen sits at the mouth of Delaware Bay, where longshore currents pile up the water-clear quartz pebbles known as Cape Henlopen (or Cape May) diamonds, sometimes tinted milky, rose, or smoky.
Quartz
- Top pick
Fowler Beach
Public accessSussex County
Fowler Beach is an undeveloped Delaware Bay shoreline on the edge of Prime Hook National Wildlife Refuge, and one of the better free beaches in the state for the water-clear quartz called Cape May diamonds, with scattered chalcedony, jasper chips, shells, and sea glass in the wrack and pebble lines.
Quartz
- Top pick
Chesapeake & Delaware Canal
Public accessNew Castle County
The dredge spoil banks along the north side of the Chesapeake and Delaware Canal are Delaware's most famous fossil ground, cutting into roughly 70-million-year-old Cretaceous marl of the Mount Laurel and Merchantville formations.
Fossil
- Top pick
Pepper Creek
Public accessSussex County
Pepper Creek, a tidal creek south of Dagsboro draining toward Indian River Bay, is a Delaware Geological Survey fossil locality where Pleistocene marine shells, less than two million years old, weather out of the low banks and mix with the creek gravels.
Fossil
- Top pick
Coursey Pond
PermissionKent County
Coursey Pond, a millpond on the Murderkill drainage southeast of Felton, is one of the few inland Delaware spots where fossils turn up: poorly preserved Miocene shells and marine fragments, roughly 15 million years old, weather from the banks at the water line, mixed with quartz pebbles, feldspar, and mica in the sand and gravel.
Fossil
- Top pick
Killen Pond
PermissionKent County
Killens Pond, the centerpiece of Killens Pond State Park near Felton, is the twin of Coursey Pond in the Delaware Geological Survey's fossil-site list, with the same poorly preserved Miocene shells and marine fragments eroding from the pond banks.
Fossil
- Top pick
Near Brandywine Springs State Park
PermissionNew Castle County
The Piedmont hills around Brandywine Springs and the Red Clay valley west of Wilmington are the type area for sillimanite, Delaware's state mineral, which occurs here as large masses and boulders in the high-grade Wilmington Complex gneiss alongside garnet, mica, and microcline feldspar.
Sillimanite
- Top pick
Slaughter Beach
PermissionSussex County
Slaughter Beach is a classic Delaware Bay beachcombing shoreline near Milford, long known for shells, abundant sea glass, driftwood, and water-worn quartz, with the occasional reworked fossil or shark tooth in the tide line.
Quartz, Jasper
- Top pick
Bowers Beach
Public accessKent County
Bowers Beach is a small Delaware Bay fishing town at the mouth of the Murderkill and St. Jones rivers, where the meeting of river and bay concentrates shells, sea glass, quartz pebbles, and beach-worn material along the public strand.
Quartz
- Top pick
Pickering Beach
Public accessKent County
Pickering Beach, a quiet bay community north of Dover, is one of Delaware's most celebrated sea glass beaches, and its tide lines also yield shells, water-worn quartz, and beach pebbles.
Quartz
Rock and mineral clubs in Delaware
1 club in Delaware. Clubs run field trips, shows and workshops, and many trips go to private claims you can't reach alone.
Delaware rockhounding FAQ
Is rockhounding legal in Delaware?+
Yes, on the C&D Canal spoil banks with the Corps of Engineers' tolerance for hand collecting, by surface picking on public bay beaches, and on private land with permission. Delaware State Parks and the national wildlife refuges prohibit collecting.
Where can I find belemnites in Delaware?+
The Chesapeake and Delaware Canal spoil banks near Reedy Point and St. Georges in New Castle County, where dredged Cretaceous Mount Laurel sand yields belemnite guards, oysters, and shark teeth. Sift the spoil with a trowel and screen after rain. The Delaware Geological Survey's guide to the site is worth reading first.
Where do you find sillimanite in Delaware?+
The Piedmont schist around Brandywine Springs and Hoopes Reservoir in New Castle County, the type area for the state mineral. The park and reservoir land are look-only; loose pieces turn up in creek gravel and on private ground with permission.
Which Delaware beaches are good for pebbles?+
The Delaware Bay beaches at Bowers, Pickering, Slaughter, and Fowler and the point at Cape Henlopen, after winter storms and on falling tides, for quartz, jasper, and chert pebbles. Cape Henlopen is a state park, so treat fossils there as look-only.
What rocks and minerals can you find in Delaware?+
Delaware spots in this list most often produce quartz, fossils, sillimanite, iron ore, and jasper, plus belemnites and shark teeth from the canal.
Where can I go rock hunting in Delaware?+
Rock hunting, rock collecting and rockhounding are the same hobby under different names. 13 spots are mapped in Delaware, 8 of them with public access. Sussex County, Kent County, and New Castle County have the most.
Is there gem mining or pay-to-dig in Delaware?+
No fee digs or pay-to-dig gem mines are mapped in Delaware yet. 8 of the 13 spots here have public access, so you can collect without paying a dig fee.
Where can I dig for crystals in Delaware?+
6 mapped spots in Delaware report quartz, amethyst, or smoky quartz, mostly in Sussex County and Kent County. Each one is in the list on this page with its land access.
Can you find geodes in Delaware?+
None of the 13 mapped spots in Delaware report geodes. The nearest states with mapped geode spots are Pennsylvania (4), New Jersey (1), and Virginia (1).
Where can I go fossil hunting in Delaware?+
4 mapped spots in Delaware report fossils, mostly in Kent County, New Castle County, and Sussex County. On federal land you may keep common shells, corals and plant fossils. Bones and teeth of animals with a backbone are protected.
Map every Delaware spot in the app
Open the RockHoundR app to see Delaware on a real map with public land overlays, weather, geology, and your saved finds.
