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