Calcite
Calcium Carbonate (CaCO3)
mineral
Category
Mineral
Browse mineral specimens identified by the Rock Identifier community.
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Sandstone
Sandstone (Sedimentary rock composed of silicate grains)
sedimentary
Amber
Succinite (fossilized tree resin), C10H16O
Organic Gemstone
Pink Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
mineral
Eagle Eye / Grey Tiger Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
mineral
Sandstone
Arenite (SiO2 predominantly)
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Granite (Pegmatitic)
Phaneritic Felsic Igneous Rock
igneous
Mica Schist
Mica Schist (predominantly Muscovite or Biotite)
metamorphic
Basalt
Mafic Extrusive Igneous Rock
Igneous
Mica Schist
Mica Schist (primarily composed of Muscovite/Biotite)
metamorphic
Basalt
Basalt (composition of plagioclase feldspar and pyroxene)
igneous
Eudialyte with Syenite
Eudialyte: Na15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2
igneous
Granite
Phaneritic Igneous Rock (primarily Quartz, Feldspar, and Mica)
igneous
Diorite
Diorite (Intermediate intrusive igneous rock)
igneous
Banded Gneiss
Gneiss (pronounced "nice")
metamorphic
Granite
Phaneritic Plutonic Rock (Granite)
igneous
Gneiss
Gneiss
metamorphic
Quartz (Quartzite fragment)
Silicon Dioxide (SiO2)
mineral
Ferruginous Quartz (River Pebble)
Silicon Dioxide (SiO2) with Iron Oxide inclusions
mineral
Greenschist
Greenschist (Chlorite-actinolite schist)
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Amber (Copal)
Fossilized Tree Resin
mineraloid
Amber
Succinate (Fossilized Tree Resin)
fossil
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Peridotite (Dunite)
Olivine-rich Peridotite ((Mg,Fe)2SiO4)
igneous
Banded Agate
Cryptocrystalline Quartz (SiO2)
mineral
Gypsum (Satin Spar / Alabaster variety)
Calcium Sulfate Dihydrate (CaSO4·2H2O)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Limonite (Ironstone)
FeO(OH)·nH2O (Hydrous ferric oxides)
mineral
Chert (Jasper variety)
Microcrystalline Quartz (SiO2)
sedimentary
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Quartz / Quartzite
Silicon Dioxide (SiO2)
Metamorphic or Mineral
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Jasper (Iron-stained Quartzite/Chert)
Silicon Dioxide (SiO2) with iron oxide inclusions
Sedimentary
Obsidian
Obsidian (Volcanic Glass, SiO2)
igneous
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral