Sedimentary rocks & minerals
Sedimentary rocks form from accumulated grains, chemical precipitates, or organic material — usually in layered beds. They preserve most of the fossil record and many economic deposits.
Field tip: Bedding planes, grain rounding, and fossil content all point to a sedimentary origin.
45 sedimentarys in this encyclopedia.
Arkosecommonsedimentary · Mohs 6-7pink, gray, tan
Banded Iron Formationcommonsedimentary · Mohs 5-7red, gray, black
Bauxitecommonsedimentary · Mohs 1-3red, brown, tan
Bentonitecommonsedimentary · Mohs 1-2white, cream, gray
Bluestonecommonsedimentary · Mohs 3-7blue, gray, bluish-gray
Brecciacommonsedimentary · Mohs 3-7gray, brown, red
Cannel Coalcommonsedimentary · Mohs 2-3black, brownish-black
Catlinitecommonsedimentary · Mohs 2.5-3red, reddish-brown, brown
Chalkcommonsedimentary · Mohs 1white, off-white, gray
Claystonecommonsedimentary · Mohs 1-2gray, brown, red
Coalcommonsedimentary · Mohs 0.5-2.5black, brown
Concretioncommonsedimentary · Mohs 3-7brown, gray, tan
Coquinacommonsedimentary · Mohs 3tan, white, light gray- No imageCrab Orchard Sand Stonecommonsedimentary · Mohs 6-7pink, red, buff
Crinoidal Limestonecommonsedimentary · Mohs 3gray, tan, white
Dolostonecommonsedimentary · Mohs 3.5-4gray, white, buff
Dunham Dolomitecommonsedimentary · Mohs 3.5-4gray, buff, tan
Geodecommonsedimentary · Mohs 7white, gray, brown
Greywackecommonsedimentary · Mohs 6-7gray, dark gray, brownish gray- No imageGypsitecommonsedimentary · Mohs 1.5-2white, gray, yellowish
Impactiteuncommonsedimentary · Mohs 5-7black, brown, green
Itacolumiteuncommonsedimentary · Mohs 6-7yellow, brown, tan
Jaspilitecommonsedimentary · Mohs 6-7red, gray, silver
Limecommonsedimentary · Mohs 3-4white, gray, yellow
Limestonecommonsedimentary · Mohs 3white, gray, tan
Mudstonecommonsedimentary · Mohs 2-3gray, brown, red
Nodulescommonsedimentarygray, brown, black
Novaculitecommonsedimentary · Mohs 7white, gray, black
Oolitecommonsedimentary · Mohs 3white, gray, tan
Oolitic Limestonecommonsedimentary · Mohs 3white, tan, gray
Phosphoritecommonsedimentary · Mohs 3-5gray, brown, black- No imagePotomac Marblecommonsedimentary · Mohs 3-4red, green, brown
Puddingstonecommonsedimentarymulticolored, gray, red
Red Sandstonecommonsedimentary · Mohs 6-7red, red-brown, rust
Rockcastle Conglomeratecommonsedimentary · Mohs 6-7gray, white, tan
Sandstonecommonsedimentary · Mohs 6-7tan, brown, yellow- No imageSandstone With Calcite Veinscommonsedimentary · Mohs 3-7tan, brown, red
Septarian Nodulescommonsedimentary · Mohs 3-5brown, yellow, gray
Shalecommonsedimentary · Mohs 2-3gray, black, red- No imageSiliceous Oolitecommonsedimentary · Mohs 6.5-7white, gray, tan
Siltstonecommonsedimentary · Mohs 3-4gray, red, brown
Travertinecommonsedimentary · Mohs 3-4white, tan, cream
Tufacommonsedimentary · Mohs 3white, gray, yellow
Whetstonecommonsedimentary · Mohs 5-7gray, white, brown
Wonderstonecommonsedimentary · Mohs 6.5-7red, yellow, brown
Identify sedimentarys in the field
Open RockHoundR to look up properties offline and find rockhounding spots near you.
