Garnet
Garnet Group (complex nesosilicates with general formula X3Y2(SiO4)3, where X can be Ca, Mg, Fe2+, Mn2+ and Y can be Al, Fe3+, Cr3+, V3+)
Category
Browse sedimentary like (industrial composite) specimens identified by the Rock Identifier community.
Garnet
Garnet Group (complex nesosilicates with general formula X3Y2(SiO4)3, where X can be Ca, Mg, Fe2+, Mn2+ and Y can be Al, Fe3+, Cr3+, V3+)
Sandstone (Ferruginous)
Arenite (Fe-rich)
Garnet (likely Almandine)
Almandine - Fe3Al2(SiO4)3
Blue Zircon
Zirconium Silicate (ZrSiO4)
Sapphire
Corundum (Al2O3)
Schist
Chlorite-Mica Schist
Sandstone (likely Arkosic)
Clastic Sedimentary Rock
Clear Quartz
Crystalline Silicon Dioxide (SiO2)
Concretion (Sandstone)
Sandstone Concretion
Diamond (Colorless/White)
Carbon (C)
Sandstone
Arenite
Common Opal
Amorphous Hydrated Silica (SiO2·nH2O)
Blue Apatite
Chlorapatite / Fluorapatite (Ca5(PO4)3(F,Cl,OH))
Anthracite Coal
Anthracite
Quartz with Mica inclusions (Gold-colored Mica)
Silicon Dioxide (SiO2) with Potassium Aluminum Silicate (Phlogopite/Muscovite) inclusions
Anthracite Coal
Anthracite (Carbon-based metamorphic rock)
Smoky Quartz
Silicon Dioxide (SiO2)
Quartzite
Metamorphic rock primarily composed of Quartz (SiO2)
Smoky Quartz
Smoky Quartz (SiO2 - Silicon Dioxide with trace impurities of aluminum)
Ruby
Corundum (Al2O3 with Chromium traces)
Stainless Steel (Polished)
Ferrous Alloy containing Iron (Fe), Chromium (Cr), and Carbon (C)
Granite
Granite (Mainly Quartz, Alkali Feldspar, and Plagioclase)
Orange Calcite (Polished Sphere)
Calcium Carbonate (CaCO3)
Quartzite (River Cobble)
Quartzite (primarily SiO2)
Serpentine (Nephrite-like River Cobble)
Serpentinite (Hydrous Magnesium Iron Silicate)
Milky Quartz with Iron Staining
Quartz (Silicon Dioxide, SiO2)
Olivine in Basalt (Peridot)
Magnesium Iron Silicate (Mg,Fe)2SiO4 (Mineral) within Basalt (Rock)
Garnet-Bearing Gneiss
Almandine-Garnet Gneiss
Desert Rose (Baryte/Gypsum Rosette)
Baryte (BaSO4) or Gypsum (CaSO4·2H2O)
Geode (Unopened)
Chalcedony/Quartz Geode (SiO2)
Sandstone
Arenite (primarily SiO2)
Olivine (Peridot)
Magnesium Iron Silicate (Mg, Fe)2SiO4
Aquamarine
Beryl (Be3Al2Si6O18 with iron impurities)
Basalt
Basalt (Mafic Extrusive Igneous Rock)
Quartzite
Quartzite (primarily SiO2)
Quartzite
Quartzite (primarily SiO2)
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2)
Quartzite
Quartzite (primarily SiO2)
Diamond
Diamond (pure carbon, C)
Olivine (Peridotite/Dunite)
Olivine (Mg,Fe)2SiO4 within Peridotite
Epidote
Epidote - Ca2(Al2,Fe3+)3(SiO4)3(OH)
Greenschist
Greenschist (chlorite-epidote schist)