Granite
Granite (dominated by Quartz, Alkali Feldspar, and Plagioclase)
Category
Browse sedimentary or igneous specimens identified by the Rock Identifier community.
Granite
Granite (dominated by Quartz, Alkali Feldspar, and Plagioclase)
Pink Granite (Potassium-rich)
Phaneritic Felsic Igneous Rock (K-Feldspar Granite)
Granite
Granite (composed of Quartz, Alkali Feldspar, and Plagioclase)
Black Obsidian
Obsidian (Volcanic Glass)
Granite
Granite (Phaneritic Quartz-rich Igneous Rock)
Amygdaloidal Basalt with Zeolite/Quartz Infill
Amygdaloidal Basalt (Host: (Mg,Fe)2SiO4 / CaAl2Si2O8; Infill: SiO2 or Na2Al2Si3O10·2H2O)
Basalt
Basaltic Mafic Rock
Granite (Weathered River Rock)
Plutonic Igneous Rock (primarily Quartz, Feldspar, and Mica)
Diorite (or salt-and-pepper granite pebble)
Phaneritic Igneous Rock (Intermediate Composition)
Magnetite (or Magnetic Iron Ore)
Magnetite (Fe3O4)
Granite (with Almandine Garnet inclusions)
Granite composed primarily of Quartz (SiO2), K-Feldspar (KAlSi3O8), and Almandine Garnet (Fe3Al2(SiO4)3)
Granite
Granite
Granite
Granite (High-silica plutonic rock)
Dolerite (Diabase)
Dolerite / Diabase
Granite
Phaneritic Igneous Rock (primarily Quartz, Feldspar, and Mica)
Milky Quartz
Silicon Dioxide (SiO2)
General Rock and Mineral Collection (Center: Angelite / Blue Anhydrite)
Anhydrite (Calcium Sulfate, CaSO4)
Sodalite
Sodalite: Na8(Al6Si6O24)Cl2
Granite (likely a river or beach pebble)
Granite (a felsic intrusive igneous rock primarily composed of quartz, feldspar, and mica)
Peridotite
Peridotite (Ultramafic Rock)
Strawberry Quartz (Aventurine)
Silicon Dioxide with Hematite/Lepidocrocite inclusions (SiO2)
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
Rose Quartz
Silicon Dioxide (SiO2) with trace Titanium, Iron, or Manganese
Muscovite
Muscovite (KAl2(AlSi3O10)(OH)2)
Labradorite
(Ca, Na)(Al, Si)4O8
Strawberry Quartz
Quartz with Hematite inclusions (SiO2 + Fe2O3)
Moonstone
Orthoclase Feldspar ((K,Na)AlSi3O8)
Emerald
Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)
Tumbled Moonstone
Feldspar (Orthoclase/Albite), KAlSi3O8
Labradorite
Labradorite ((Ca, Na)(Al, Si)4O8)
Sodalite
Sodalite, Na8(Al6Si6O24)Cl2
Sodalite
Na8(Al6Si6O24)Cl2
Quartz (Citrine or Smoky variant)
Silicon Dioxide (SiO2)
Citrine
Silicon dioxide (SiO2)
Chalcopyrite
Copper Iron Sulfide (CuFeS2)
White Quartz (Mushroom Carving)
Quartz (Silicon Dioxide - SiO2)
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
Amethyst
Silicon Dioxide (SiO2) with iron impurities
Smoky Quartz Cluster
Quartz (Silicon Dioxide) - SiO2
Arfvedsonite (often mistakenly sold as Astrophyllite)
Arfvedsonite [Na3(Fe2+)4Fe3+Si8O22(OH)2]
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
Amazonite
Microcline (KAlSi3O8) with trace lead (Pb)