Mineral (Primary Constituent)

Browse mineral (primary constituent) specimens identified by the Rock Identifier community.

Fuchsite

Fuchsite (a variety of Muscovite mica, K(Al,Cr)2(AlSi3O10)(OH)2)

mineral

Chalcedony Geode

Chalcedony (SiO2) within a geode structure

Mineral Geode/Sedimentary or Volcanic related

Serpentine Schist with Quartz Vein

Serpentine Schist (a type of Metamorphic rock). The white band is likely Quartz (SiO2).

Metamorphic

Gold

Aurum (Elemental Gold, Au)

Mineral, Metal (element)

Aquamarine

Aquamarine (Beryl variety); Be3Al2Si6O18

mineral

Shale

sedimentary

Unakite

Epidote-Feldspar rock

Metamorphic Rock

Quartz (likely Clear Quartz or Rock Crystal)

Quartz (SiO2)

Mineral

Lapis Lazuli

Lazurite (primary mineral component), (Na,Ca)8(AlSiO4)6(S,SO4,Cl)1-2

metamorphic

Quartz

Quartz (SiO2, Silicon Dioxide)

Mineral

Greisen

Metamorphic

Fluorite (often referred to casually as 'Fluorspar' in industrial contexts)

Fluorite (CaF2)

Mineral

Quartz

Silicon Dioxide (SiO₂)

Mineral

Granite

Granite (a plutonic igneous rock composed of quartz, feldspar, and mica)

igneous

Quartz (in matrix)

Quartz (SiO₂)

mineral

Ruby

Corundum (Al₂O₃) with Chromium (Cr)

Mineral (gemstone)

Malachite

Malachite (Cu2CO3(OH)2)

mineral

Apatite

Apatite group mineral (e.g., Fluorapatite - Ca5(PO4)3F, Chlorapatite - Ca5(PO4)3Cl, Hydroxylapatite - Ca5(PO4)3(OH))

mineral

Red Jasper (with Quartz Veins)

Jasper (var. chert, SiO₂)

Sedimentary Rock (technically chert, a microcrystalline quartz)

Cherry Creek Jasper (also known as Red Creek Jasper or Cherry Creek Agate)

Jasper, microcrystalline quartz (SiO₂)

Sedimentary Rock

Granite

Granite (a felsic intrusive igneous rock)

igneous

Pyrite

Pyrite (FeS2)

Mineral

Quartz

Silicon Dioxide (SiO2)

Mineral

Clear Quartz (or Rock Crystal)

Quartz (SiO₂)

Mineral

Orthoclase Feldspar

KAlSi3O8 (Potassium Aluminum Silicate)

Mineral

Quartz

Silicon Dioxide (SiO₂)

Mineral

Diamond

Diamond (pure carbon, C)

Mineral

Granite

Granite (a felsic intrusive igneous rock)

Igneous Rock

Sapphire (likely blue synthetic sapphire or blue glass in a ring)

Corundum (Al₂O₃), specifically the blue variety due to trace amounts of iron and titanium impurities. If synthetic, it would still be Al₂O₃.

Mineral

Talc

Talc (Mg₃Si₄O₁₀(OH)₂)

Mineral

Blue Quartzite

Quartzite (specifically a variety enriched with blue-coloring minerals)

Metamorphic Rock

Chalcedony (Banded/Mottled Variety)

Chalcedony (a cryptocrystalline variety of Quartz, SiO2)

Mineral

Green Aventurine

Aventurine (Silicon dioxide, SiO₂)

Mineral; variety of Quartz

Lapis Lazuli

Lapis Lazuli (a rock, not a single mineral; primary mineral is Lazurite (Na,Ca)8(AlSiO4)6(S,SO4,Cl)1-2

Metamorphic rock

Halite (Rock Salt)

Halite; NaCl (Sodium Chloride)

Mineral

Red Jasper

Jasper (a variety of Chalcedony, SiO₂ with iron oxide inclusions)

Mineral

Pyrite

Pyrite (Iron sulfide, FeS₂)

mineral

Lapis Lazuli

Lapis Lazuli (Primary mineral: Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

metamorphic

Lapis Lazuli

Lapis lazuli (primary mineral: Lazurite, (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

metamorphic

Lapis Lazuli

Lapis Lazuli (Primary mineral: Lazurite, (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)

metamorphic

Sandstone

Sandstone (arenite is a more specific geological term for a clean sandstone, while wacke refers to a dirty sandstone with significant matrix)

Sedimentary

Shale or Mudstone (Based on appearance)

Shale (fine-grained, laminated fissile sedimentary rock) / Mudstone (fine-grained, non-fissile sedimentary rock)

Sedimentary