Gneiss
Gneiss
Category
Browse granite specimens identified by the Rock Identifier community.
Gneiss
Gneiss
Milky Quartz
Silicon Dioxide (SiO2)
Quartz (Milky or Cloudy variety)
Quartz (Silicon Dioxide, SiO2)
Quartz (Milky or Iron-Stained)
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Gneiss (Metamorphic Cobble)
Gneiss (High-grade Regional Metamorphic Rock)
Gneiss
Gneissic Metamorphic Rock
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Gneiss
Gneiss (high-grade metamorphic rock typically composed of quartz, feldspar, and mica)
Granitic Gneiss
Gneiss (Polymetamorphic Granitic Gneiss)
Mixed Tumbled Gemstones and River Rocks
Mixed Decorative Stones (predominantly Silicon Dioxide - SiO2 variants)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Rhyolite (Porphyritic)
Rhyolite (Felsic Extrusive Igneous Rock)
Granitoid (Granite/Diorite)
Course-grained Plutonic Igneous Rock
Smoky Quartz
Smoky Quartz (SiO2)
Granite Glacial Erratic
Phaneritic Plutonic Felsic Rock (KAlSi3O8 – NaAlSi3O8 – CaAl2Si2O8 – SiO2)
Granite with Quartz Vein
Phaneritic Felsic Igneous Rock (composed of Quartz [SiO2], Feldspar, and Mica)
Quartz with Muscovite Mica
Silicon Dioxide (SiO2) with Potassium Aluminum Silicate Hydroxide Fluoride (KAl2(AlSi3O10)(F,OH)2)
Yellow Quartz (Citrine or Iron-Stained Quartz)
Silicon Dioxide (SiO2)
Quartz (Small Fragment)
Silicon Dioxide (SiO2)
Clear Quartz
Silicon dioxide (SiO2)
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
Smoky Quartz
Silicon Dioxide (SiO2)
Rose Quartz
Silicon Dioxide (SiO2)
Clear Quartz (Double Terminated)
Silicon Dioxide (SiO2)
Banded Rhyolite
Rhyolite (High-silica volcanic rock)
Flesh-colored Quartzite
Quartzite (SiO2)
Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of Titanium, Iron, or Manganese
Milky Quartz
Silicon Dioxide (SiO2)
Epidote in Granite Gneiss
Epidote bearing Orthogneiss (Ca2(Al,Fe)3(SiO4)3(OH))
Granitic Gneiss
Gneiss (High-grade Metamorphic Rock)
Pegmatite with Schorl (Black Tourmaline) and Mica
Pegmatite (complex association of NaAlSi3O8, NaFe3Al6(BO3)3Si6O18(OH)4, and KAl2(AlSi3O10)(OH,F)2)
Labradorite
Labradorite (Plagioclase Feldspar Series) - (Ca, Na)(Al, Si)4O8
Diabase
Diabase (Dolerite)
Gneiss (specifically Pink Gneiss)
Gneiss (high-grade regional metamorphic rock)
Gneiss (Granite Gneiss)
Gneiss
Granodiorite
Granodiorite (Quartz-Feldspar-Biotite Plutonic Rock)
Gabbro
Gabbro (phaneritic mafic intrusive rock)
Jasper containing epidote (Unakite-like)
Epidotized Jasper (SiO2 with Ca2(Al,Fe)3(SiO4)3(OH))
Granitic Pegmatite
Pegmatite