Yellow Calcite
Calcium Carbonate (CaCO3)
Category
Browse igneous or mineral specimens identified by the Rock Identifier community.
Yellow Calcite
Calcium Carbonate (CaCO3)
Yooperlite (Sodalite-bearing Syenite)
Sodalite-rich Syenite
Porphyritic Igneous Rock / Granite or Rhyolite Porphyry
Porphyritic intrusive/extrusive igneous rock
Granite
Intrusive Igneous Rock
Basalt
Extrusive Igneous Rock
Granite
Intrusive Igneous Rock
Granite Pebble
Intrusive Igneous Rock
Granite
Intrusive Igneous Rock
Porphyritic Basalt or Porphyry
Porphyritic Igneous Rock
Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Rounded mixed-grain river pebble, likely granitic rock
Granite (tentative; exact rock type cannot be confirmed from the photograph)
Orange feldspar pebble (likely potassium feldspar)
Likely orthoclase or microcline, KAlSi₃O₈
Sugilite
KNa2(Fe,Mn,Al)2Li3Si12O30
Quartz
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Granite
Phaneritic Intrusive Igneous Rock (primarily Quartz, Feldspar, and Mica)
Milky Quartz with Mica Matrix
SiO2 (Silicon Dioxide) with Muscovite/Biotite mica
Hematite
Iron(III) oxide (Fe2O3)
Red Aventurine
Quartz with hematite or goethite inclusions (SiO2)
Clear quartz (rock crystal)
Quartz, silicon dioxide (SiO₂)
Pyrite
Iron sulfide (FeS2)
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
Biotite (Black Mica)
Biotite - K(Mg,Fe)3(AlSi3O10)(F,OH)2
Fluorite
Calcium Fluoride (CaF2)
Tumbled Moonstone
Feldspar (Orthoclase/Albite), KAlSi3O8
Chalcopyrite
Copper Iron Sulfide (CuFeS2)
Magnetic Sand Grain / Magnetite Pellet
Magnetite (Fe3O4)
Arfvedsonite (often mistakenly sold as Astrophyllite)
Arfvedsonite [Na3(Fe2+)4Fe3+Si8O22(OH)2]
Blue Apatite
Apatite-(CaF), Ca5(PO4)3F (Calcium Fluorophosphate)
Fluorite with Quartz coating
Calcium Fluoride (CaF2) with Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Smoky Quartz
Silicon Dioxide (SiO2)
Aquamarine
Beryl (Be3Al2Si6O18)
Smoky Quartz
Silicon Dioxide (SiO2)
Granite
Granite
Gold Mineral
Native Gold (Au)
Quartz Crystal Cluster
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
White Quartz
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)