Gneiss (specifically a Banded Gneiss pebble)
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Category
Igneous, Sedimentary, Metamorphic, Mineral
Browse igneous, sedimentary, metamorphic, mineral specimens identified by the Rock Identifier community.
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Green Aventurine
Quartz (SiO2) with inclusions
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Rough Citrine Quartz
Citrine (Silicon Dioxide, SiO2 with iron impurities)
mineral
Quartz-veined Metamorphic Pebble
Silicate-rich metamorphic rock with quartz veins (SiO2)
metamorphic
Red Garnet
Pyrope or Almandine (X3Y2(SiO4)3)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Gemstones (Emerald and Yellow Topaz or Citrine)
Beryl (Be3Al2Si6O18) and Quartz (SiO2) or Topaz (Al2SiO4(F,OH)2)
mineral
Banded gneiss pebble
Gneiss, typically quartz–feldspar–mica assemblage
metamorphic
Epidote with Quartz/Feldspar
Epidote (Ca2(Al, Fe)3(SiO4)3(OH)) with associated minerals in a host rock
Mineral/Metamorphic rock
Mica Schist
Mica Schist (Quartz-Mica Metamorphic Rock)
metamorphic
Gold
Native gold (Au)
mineral
Moonstone (Feldspar)
Orthoclase (KAlSi3O8) or Albite (NaAlSi3O8)
mineral
Almandine Garnet
Almandine, Fe3Al2(SiO4)3
mineral
Blue Sapphire (in a faceted jewelry setting)
Corundum (Al2O3) with trace Iron and Titanium
mineral
Moonstone
Orthoclase (KAlSi3O8) or Oligoclase with adularescence
gemstone
Gneiss (Metamorphic Pebble)
Metamorphic Rock (Quartz-Feldspar-Biotite Gneiss)
metamorphic
Quartz
Silicon Dioxide (SiO2)
mineral
Citrine Quartz
Silicon Dioxide (SiO2) with ferric iron impurities
mineral
Emerald
Beryl (Be3Al2(SiO3)6)
gemstone
Blue Apatite
Fluorapatite / Ca5(PO4)3F
mineral
Garnet
Silicate mineral group (often Pyrope or Almandine in this color range)
gemstone
Biotite Mica
Biotite, K(Mg,Fe)3AlSi3O10(F,OH)2
mineral
Muscovite mica
Muscovite, KAl₂(AlSi₃O₁₀)(OH)₂
mineral
Black Tourmaline
Schorl (Na(Fe²⁺)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄)
Mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Sunstone
Feldspar (variety Oligoclase or Labradorite), (Ca,Na)(Al,Si)4O8
mineral
Amethyst (Chevron or Banded Amethyst)
Silicon Dioxide (SiO2) with trace Iron (Fe)
mineral
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) vein cutting through host rock
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Chalcopyrite
CuFeS2
mineral
Quartz Vein / Milky Quartz
Silicon Dioxide (SiO2)
mineral
Moonstone (Tumbled)
Potassium Aluminum Silicate (KAlSi3O8) with inclusions of Albite
mineral