Quartz pebble
Silicon dioxide (SiO2)
Category
Browse mineral in sedimentary specimens identified by the Rock Identifier community.
Quartz pebble
Silicon dioxide (SiO2)
Shale fragment
Shale (clay mineral rich sedimentary rock)
Gypsum (Desert Rose or Selenite variety)
Calcium Sulfate Dihydrate (CaSO4·2H2O)
Granite (possibly granitic gneiss)
Felsic plutonic rock dominated by quartz, K-feldspar, plagioclase, biotite and/or hornblende
Limonite (Yellow Ochre)
Hydrated iron(III) oxide-hydroxide (FeO(OH)·nH2O)
Polished picture jasper heart pendant
Picture jasper (microcrystalline quartz, SiO₂, with iron-oxide and clay inclusions)
Gypsum (Satin Spar/Desert Rose variety)
Calcium Sulfate Dihydrate (CaSO4·2H2O)
Reddish weathered volcanic rock, probably andesite
Andesite (fine-grained plagioclase–pyroxene volcanic rock), possibly altered basalt
Quartz Pebble
Silicon dioxide (SiO2)
Satin Spar (Selenite variant)
Gypsum (Calcium Sulfate Dihydrate, CaSO4·2H2O)
Quartz Crystal Cluster
Silicon Dioxide (SiO2)
Quartz Crystal Cluster
Silicon Dioxide (SiO2)
Satin Spar (often sold as Selenite)
Gypsum (Calcium Sulfate Dihydrate, CaSO4·2H2O)
Pyrite in Matrix
Iron Disulfide (FeS2)
Satin Spar Selenite
Gypsum (CaSO4·2H2O)
Pink Satin Spar (Satin Spar Selenite Dyed)
Gypsum (CaSO4·2H2O)
Pyrite
Iron Sulfide (FeS2)
Satin Spar (Gypsum)
Calcium Sulfate Dihydrate (CaSO4·2H2O)
Limonite (Ochreous Sandstone)
Hydrous ferric oxides (FeO(OH)qnH2O)
Selenite (Satin Spar)
Gypsum (CaSO4·2H2O)
Hematite
Iron(III) oxide, Fe2O3
Gypsum (Alabaster variety)
Calcium sulfate dihydrate (CaSO4·2H2O)
Chert
Microcrystalline Quartz (SiO2)
Satin Spar Selenite
Gypsum (CaSO4·2H2O)
Satin Spar (often sold as Selenite)
Gypsum (CaSO4·2H2O)
Satin Spar (Satin Spar Selenite)
Gypsum (CaSO4·2H2O)
Rhodochrosite
Manganese Carbonate (MnCO3)
Iron Ore (Limonite and Hematite)
Goethite/Limonite (FeO(OH)·nH2O) and Hematite (Fe2O3)
Selenite (Satin Spar)
Gypsum (CaSO4·2H2O)
Limonite Concretion / Ironstone
Hydrated iron(III) oxide-hydroxide, FeO(OH)·nH2O
Satin Spar (Selenite)
Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O
Selenite (variety of Gypsum)
Calcium sulfate dihydrate (CaSO4·2H2O)
Pyrite
Iron Disulfide (FeS2)
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
Gypsum (variety Selenite or Alabaster)
Calcium sulfate dihydrate (CaSO4·2H2O)
Clear Quartz
Silicon Dioxide (SiO2)
Rhodochrosite with Quartz
Manganese Carbonate (MnCO3) with Silicon Dioxide (SiO2)
Satin Spar (often marketed as Selenite)
Gypsum (CaSO4·2H2O)
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
Pyrite
Iron Sulfide (FeS2)
Pyrite
Iron sulfide (FeS2)