Quartz
Silicon Dioxide (SiO2)
Category
Browse igneous and mineral specimens identified by the Rock Identifier community.
Quartz
Silicon Dioxide (SiO2)
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
Pyrite in Quartzite/Graphite Matrix
Iron Sulfide (FeS2)
Orange Calcite
Calcium Carbonate (CaCO3)
Pyrite
Iron Sulfide (FeS2)
Green Calcite
Calcium Carbonate (CaCO3)
Clear Quartz
Quartz (Silicon Dioxide, SiO2)
Unakite
Epidotized Granite
Moonstone (Feldspar)
Orthoclase (KAlSi3O8) or Albite (NaAlSi3O8)
Pyrite
Iron Sulfide (FeS2)
Pyrulite (Pyrite / Chalcopyrite)
Iron Sulfide (FeS2) or Copper Iron Sulfide (CuFeS2)
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
Rose Quartz
Silicon dioxide (SiO2)
Chromium (Chrome)
Chromium (Cr)
Amygdaloidal Basalt
Amygdaloidal Basalt (with secondary mineral infilling)
Quartz with inclusions (likely Tourmaline or Biotite)
Silicon Dioxide (SiO2)
Granite
Granite (felsic intrusive igneous rock)
Fluorite
Calcium Fluoride (CaF2)
Granodiorite
Granodiorite (Intermediate intrusive igneous rock)
Dalmatian Stone (commonly called Dalmatian Jasper)
Peralkaline Rock (mixed Feldspar, Quartz, and Arfvedsonite)
Granite
Granite (Felsic Plutonic Rock)
Quartz (Drusy/Crystalline)
Silicon Dioxide (SiO2)
Sodalite
Na8(Al6Si6O24)Cl2
Granite
Intrusive igneous felsic rock
Pegmatite with Schorl (Black Tourmaline) and Mica
Pegmatite (complex association of NaAlSi3O8, NaFe3Al6(BO3)3Si6O18(OH)4, and KAl2(AlSi3O10)(OH,F)2)
Dalmatian Jasper
Peralkaline rhyolite
Amethyst
Silicon Dioxide (SiO2)
Rose Quartz
Silicon dioxide (SiO2) with trace amounts of titanium, iron, or manganese
Labradorite
Labradorite (Ca,Na)(Al,Si)4O8
Labradorite
Labradorite ((Ca, Na)(Al, Si)4O8)
Olivine (likely Peridot variety)
Olivine Mineral Group (specifically Forsterite-Fayalite solid solution series); Chemical formula: (Mg,Fe)2SiO4
Green Fluorite
Fluorite (Calcium Fluoride, CaF2)
Quartz (Milk Quartz / Massive Quartz)
Silicon Dioxide (SiO2)
Granite
Granite (Felsic Plutonic Rock)
Granitic Pegmatite with Biotite
Pegmatitic Granite (contains KAlSi3O8, SiO2, K(Mg,Fe)3AlSi3O10(OH)2)
Milky Quartz
Silicon Dioxide (SiO2)
Diorite
Diorite
Granite
Phaneritic plutonic felsic rock (primarily Quartz, Feldspar, and Mica)
Sunstone
Plagioclase Feldspar (containing (Ca,Na)(Al,Si)4O8 with Hematite or Copper inclusions)
Pyrite
Iron Pyrite (FeS2)
Granite Pegmatite
Phaneritic Plutonic Igneous Rock