Granite Gneiss
High-grade regional metamorphic rock (Quartz-Feldspar Gneiss)
Category
Browse metamorphic specimens identified by the Rock Identifier community.
Granite Gneiss
High-grade regional metamorphic rock (Quartz-Feldspar Gneiss)
Wishing Stone with Quartz Veins
Quartzite or Quartz-veined Metamorphic Rock (composed mainly of SiO2)
Gneiss
Gneiss (Metamorphic rock composed primarily of quartz, feldspar, and mica)
Diamond Drill Core (Greenschist and Quartzite)
Chlorite Schist / Meta-quartzite (Metamorphic Rock Core Sample)
Anthracite Coal
Anthracite (Carbon-based sedimentary rock typically classified as metamorphic)
Greenschist
Chlorite schist (Metamorphic rock dominated by chlorite, epidote, and actinolite)
Gneiss
Gneiss (Metamorphic rock of variable composition, typically SiO2 rich)
Almandine Garnet & Tumbled Citrine Quartz
Fe3Al2(SiO4)3 (Garnet) and SiO2 (Quartz)
Quartzite
Quartzite (primarily SiO2)
Quartzite
Quartzite (primarily SiO2)
Quartzite
Quartzite (SiO2)
Tiger's Eye (Rough)
Pseudomorph of Quartz after Crocidolite (SiO2 with iron inclusions)
Quartzite
Quartzite (SiO2)
Quartz (Druzy) on Matrix
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Red Garnet (Pyrope or Almandine)
Magnesium aluminum silicate (Mg3Al2(SiO4)3) or Iron aluminum silicate (Fe3Al2(SiO4)3)
Pyrite
Iron Disulfide (FeS2)
Bull Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Milky Quartz (with trace inclusions)
Silicon Dioxide (SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Mica-rich Pegmatite
Pegmatite (rich in Muscovite and Biotite)
Green Kyanite
Kyanite (Al2SiO5)
Milky Quartz with Chlorite/Moss Infusions
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Gneiss
Gneiss (High-grade metamorphic rock typically composed of Quartz, Feldspar, and Mica/Amphibole)
Banded Gneiss
Gneiss (High-grade metamorphic rock typically composed of Quartz, Feldspar, and Biotite/Amphiboles)
Infinite Stone
Serpentine with Chrysotile (Mg3(Si2O5)(OH)4)
Peach Moonstone
Potassium Aluminum Silicate (KAlSi3O8) with inclusions
Ruby / Red Corundum
Al2O3 (Aluminum Oxide with Chromium trace)
Milky Quartz
Silicon Dioxide (SiO2)
Quartz (partially iron-stained)
Silicon Dioxide (SiO2)
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
Milky Quartz
Silicon Dioxide (SiO2)
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
Pyrite
Iron Sulfide (FeS2)
Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite mica
Emerald in Matrix
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
Green Aventurine
SiO2 (Silicon Dioxide with Fuchsite inclusions)
Sodalite
Na8(Al6Si6O24)Cl2
Citrine Quartz (Raw)
Silicon Dioxide (SiO2)