Pyrite in Matrix
Iron Sulfide (FeS2)
Category
Browse igneous and mineral specimens identified by the Rock Identifier community.
Pyrite in Matrix
Iron Sulfide (FeS2)
Red Garnet (likely Almandine or Pyrope)
Garnet group: X3Y2(SiO4)3 (e.g., Almandine: Fe3Al2Si3O12)
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
Granite
Intrusive igneous rock
Apatite
Fluorapatite / Chlorapatite (Ca5(PO4)3(F,Cl,OH))
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Dalmatian Stone
Peralkaline rhyolite
Pyrite
Iron Sulfide (FeS2)
Pink Feldspar (Orthoclase)
Orthoclase Feldspar (KAlSi3O8)
Mixed Tumbled Rocks and Minerals Collection
Mixed Minerals and Rocks (Quartz, Feldspar, Jasper, Agate, Lapis Lazuli, Sodalite, Rose Quartz, Fluorite, etc.)
Magnetite (Lodestone)
Magnetite (Fe3O4)
Pyrite
Iron Sulfide (FeS2)
Magnetite
Magnetite (Fe3O4)
Diorite (Porphyritic) / Granite
Plutonic Igneous Rock (Granodiorite / Diorite)
Basalt
Extrusive Igneous Rock
Granite
Intrusive Igneous Rock
Granite Pebble
Intrusive Igneous Rock
Granite
Intrusive Igneous Rock
Porphyritic Basalt or Porphyry
Porphyritic Igneous Rock
Porphyry (Rhyolite or Andesite Porphyry)
Porphyritic Igneous Rock
Mica
Mica group (often Muscovite or Biotite)
Yellow Sapphire or Citrine
Al2O3 (Corundum) or SiO2 (Quartz)
Quartz with Muscovite Mica
Silicon Dioxide (SiO2) with Potassium aluminum silicate hydroxide fluoride [KAl2(AlSi3O10)(F,OH)2]
Milky Quartz
Silicon Dioxide (SiO2)
Milky quartz fragment
Quartz, silicon dioxide (SiO₂)
Muscovite Mica
KAl2(AlSi3O10)(F,OH)2
Granite
Phaneritic Felsic Igneous Rock
Granite
Felsic intrusive igneous rock
Granite
Granite
Quartz pebble
Silicon dioxide (SiO2)
Quartz (Pink / Ferruginous)
Silicon Dioxide (SiO2)
Tumbled sodalite
Sodalite, Na8(Al6Si6O24)Cl2, commonly occurring in nepheline-syenite rocks
Unakite Epidote-Granite
Unakite (Epidotized Granite)
Blue Quartz
Silicon Dioxide (SiO2) with inclusions
Epidote with quartz/feldspar
Epidote, Ca2(Al,Fe)3(SiO4)3(OH)
Granite
Intrusive Igneous Rock
Gneiss
Gneiss
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
Milky quartz (rough quartz specimen)
Quartz, silicon dioxide (SiO₂)
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
Dalmation Stone (Dalmation Jasper)
Peralkaline rock (primarily Feldspar and Quartz with Arfvedsonite spots)
Quartz Mineral
Silicon Dioxide (SiO2)