Sandstone
Arenite (primarily SiO2)
sedimentary
Category
Sedimentary Mineral
Browse sedimentary mineral specimens identified by the Rock Identifier community.
Sandstone
Arenite (composed primarily of Quartz: SiO2)
sedimentary
Banded Slate or Siltstone with Quartz/Calcite Veins
Protolith-derived Siltstone or Slate (varies based on degree of metamorphism)
metamorphic
Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Sandstone
Arenite (Siliclastic sedimentary rock, primarily SiO2)
sedimentary
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Gneiss
Gneiss
metamorphic
Amber
Amber (C10H16O)
mineral
Quartz Druzy Geode Fragment
Silicon Dioxide (SiO2)
mineral
Emerald / Green Beryl
Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities
mineral
Quartz Druze (Crystalline Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz Geode
Silicon Dioxide (SiO2) within a secondary sedimentary structure
sedimentary
Travertine
Terrestrial Sedimentary Rock (CaCO3)
sedimentary
Gneiss
Gneiss
metamorphic
Carnelian
Carnelian (SiO2 with Iron Oxide impurities)
mineral
Hematite / Goethite (Iron Ore)
Iron Oxide (Fe2O3 / FeO(OH))
mineral
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Sandstone
Arenite (primarily SiO2 - Silicon Dioxide)
sedimentary
Opal
Hydrated amorphous form of silica (SiO2·nH2O)
mineral
Clear Quartz Crystal
Quartz (Silicon Dioxide, SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Pink Dyed Agate
Silicon Dioxide (SiO2) with synthetic pigment
mineral
Satin Spar
Fibrous Gypsum (CaSO4·2H2O)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Biotite Mica
K(Mg, Fe)3AlSi3O10(F, OH)2
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Blue Kyanite
Kyanite (Al2SiO5)
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Magnetite (likely with weathered Limonite/Hematite)
Magnetite (Fe3O4) with iron oxide weathering
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Vanadinite
Vanadinite (Pb5(VO4)3Cl)
mineral
Pyrite (on Quartz matrix)
Iron Sulfide (FeS2)
mineral
Quartz (Grain/Fragment)
Silicon Dioxide (SiO2)
mineral
Blue Kyanite
Kyanite (Al2SiO5)
mineral
Quartz (specifically Milky or Clear Quartz)
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Titanium-Coated Hematite (Aura Hematite)
Titanium-bonded Hematite (Fe2O3 with a Ti coating)
mineral
Celestite (Celestine)
Celestine (Strontium Sulfate, SrSO4)
Mineral