Limonite-stained Granite
Felsic Plutonic Rock with Hydrated Iron Oxides
Category
Browse granite specimens identified by the Rock Identifier community.
Limonite-stained Granite
Felsic Plutonic Rock with Hydrated Iron Oxides
Gabbro
Phaneritic mafic intrusive igneous rock
Milky Quartz Chip
Silicon Dioxide (SiO2)
Black Tourmaline
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
Milky Quartz
Silicon Dioxide (SiO2)
Quartz (Smoky Quartz variant)
Silicon Dioxide (SiO2)
Smoky Quartz
Silicon Dioxide (SiO2)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Kunzite (Pink Spodumene)
Spodumene, LiAl(SiO3)2
Gneiss
Gneiss (High-grade metamorphic rock)
Green Fluorite
Calcium Fluoride (CaF2)
Gneiss
Gneiss
Quartz (Vein Quartz)
Silicon Dioxide (SiO2)
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
Quartz (Small Grains)
Silicon Dioxide (SiO2)
Amazonite
Microcline (variety Amazonite), K(AlSi3O8)
Quartz
Silicon Dioxide (SiO2)
Muscovite Mica (Golden/Yellow variety)
KAl2(AlSi3O10)(F,OH)2
Banded Gneiss
Gneiss (Metamorphic high-grade, predominantly SiO2, Al2O3, K2O, Na2O)
Gneiss
Gneiss (high-grade metamorphic rock)
Feldspar (specifically Orthoclase)
Potassium aluminum silicate (KAlSi3O8)
Quartz (Rose or Milky)
Silicon Dioxide (SiO2)
Gneiss (specifically Micaceous Gneiss)
Gneiss (High-grade Regional Metamorphic Rock)
Gneiss
Gneiss (foliated metamorphic rock)
Granitic Gneiss
Gneiss (Metamorphic rock of granitic composition)
Feldspar (specifically Orthoclase)
Potassium Aluminum Silicate (KAlSi3O8)
Diorite (River Cobble)
Intermediate plutonic igneous rock
Smoky Quartz
Smoky Quartz (Silicon Dioxide - SiO2)
Black Tourmaline (Schorl)
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
Aquamarine
Beryl (Be3Al2Si6O18)
Amazonite
K(AlSi3O8) - Potassium Aluminum Silicate (variety of Microcline)
Pink Tourmaline in Quartz
Elbaite [Na(Li,Al)3Al6(BO3)3Si6O18(OH)4] in Quartz [SiO2]
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
Beryl in Quartz Matrix
Beryllium Aluminum Silicate (Be3Al2Si6O18)
Amazonite
Microcline (KAlSi3O8) with lead impurities
Amazonite
Microcline (KAlSi3O8)
Diorite (with Salt-and-Pepper Texture)
Diorite (Intrusive Igneous Rock)
Venetian Gold Granite
Phaneritic Felsic Igneous Rock (Granite)
Orthoclase Feldspar
Potassium aluminum silicate (KAlSi3O8)
Aquamarine with Sunstone
Aquamarine (Be3Al2Si6O18), Sunstone (Na,Ca)Al(Si,Al)Si2O8
Biotite Mica in Host Rock
Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2)
Quartz (Quartzite fragment)
Silicon Dioxide (SiO2)