Sandstone
Arenite (SiO2 principal component)
Category
Browse non geological specimens identified by the Rock Identifier community.
Sandstone
Arenite (SiO2 principal component)
Sandstone
Arenite (primarily SiO2)
Ferruginous Sandstone
Sandstone with iron oxide (Hematite/Limonite) cement
Azurite Malachite (Mixed)
Azurite-Malachite; Azurite: Cu3(CO3)2(OH)2 / Malachite: Cu2CO3(OH)2
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
White Quartz (Mushroom Carving)
Quartz (Silicon Dioxide - SiO2)
Gold
Native Gold (Au)
Quartz Vein in Host Rock
Silicon Dioxide (SiO2)
Ferruginous Sandstone
Arenite with Iron-Oxide Cement (SiO2 with Fe2O3/FeO(OH))
Basalt with Olivine Phenocrysts
Porphyritic Basalt (with (Mg, Fe)2SiO4)
Vesicular Basalt (Amygdaloidal)
Vesicular Basalt (Fe-Mg rich extrusive volcanic rock)
Quartzite with Quartz Veining
Quartzite (primarily SiO2)
Diorite (Dalmatian Stone)
Phaneritic Plutonic Diorite
Sandstone
Arenite
Shungite
Carbonaceous rock (primarily amorphous carbon)
Pink Opal / Peruvian Opal
Hydrated amorphous silicon dioxide (SiO2·nH2O)
Nephrite (a form of Jade)
Nephrite (a variety of the mineral actinolite, Ca2(Mg,Fe)5Si8O22(OH)2)
Aquamarine
Beryl (Be₃Al₂Si₆O₁₈), specifically a blue or cyan variety
Quartz (various varieties)
SiO₂ (Silicon Dioxide)
Moonstone
Adularia (orthoclase feldspar variety)
Rose Quartz (likely carved)
Rose Quartz (SiO2)
Pyrite
Pyrite (FeS₂)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Unakite
Unakite (an altered granite composed of Epidote, Orthoclase, and Quartz)
Unakite (Epidotized Granite)
Unakite (Rock composed of Epidote Ca2(Al,Fe)3(SiO4)3(OH), Orthoclase KAlSi3O8, and Quartz SiO2)
Milky Quartz Pebble with Chert
Silicon Dioxide (SiO2)
Unakite
Unakite (Epidotized Granite)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Unakite (Epidotized Granite)
Epidotized Granite
Unakite
Epidotized Granite
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of Titanium, Iron, or Manganese
Unakite
Epidotized Granite (SiO2 with Ca2(Al, Fe)3(SiO4)3(OH))
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
Pink Banded Onyx (Mexican Onyx / Calcite)
Calcite (CaCO3) - microcrystalline calcium carbonate
Apatite
Apatite Group (e.g., Fluorapatite Ca5(PO4)3F, Chlorapatite Ca5(PO4)3Cl, Hydroxylapatite Ca5(PO4)3(OH))
Nephrite Jade
Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2)
Sedimentary rock with quartz veining
Laminated siltstone or mudstone with hydrothermal quartz veins
Charoite
Charoite (Hydrated potassium sodium calcium barium strontium silicate hydroxyfluoride)
Ferruginous Sandstone
Clastic Sedimentary Rock (Iron-rich)
Fossil Brachiopod Cast (Atrypa species)
Phylum Brachiopoda, Class Rhynchonellata, Order Atrypida