Gneiss (Metamorphic Rock)
Gneiss (high-grade regional metamorphic rock)
Category
Browse metamorphic or igneous with mineral inclusion specimens identified by the Rock Identifier community.
Gneiss (Metamorphic Rock)
Gneiss (high-grade regional metamorphic rock)
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
Obsidian (Arrowhead Lithic Tool)
Obsidian (Amorphous Volcanic Glass / SiO2 + inclusions)
Gneiss
Gneiss
Basalt
Basalt (Aphanitic Mafic Igneous Rock)
Hypersthene
(Mg,Fe)SiO3 - Enstatite-Ferrosilite series
Jade (Nephrite or Jadeite)
Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2) or Jadeite (Na(Al,Fe3+)Si2O6)
Milky Quartz
Silicon Dioxide (SiO2)
Greenschist
Greenschist facies rock (containing chlorite, actinolite, albite, and epidote)
Gneiss
Gneiss (High-grade metamorphic rock)
Ruby in Fuchsite
Corundum (Al2O3) in Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)
Pyrite
Iron Sulfide (FeS2)
Biotite (Black Mica)
Biotite (K(Mg,Fe)3AlSi3O10(OH)2)
Yellow Quartz
Silicon Dioxide (SiO2)
Greenstone (Greenschist)
Greenschist (composed of Chlorite, Epidote, and Actinolite)
Gneiss
Gneiss (High-grade metamorphic rock)
Lapis Lazuli
Lapis Lazuli (Complex silicate mineral mix including Lazurite, Pyrite, and Calcite)
Indian Agate
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Basalt with Quartz/Feldspar Inclusions
Amygdaloidal or Porphyritic Mafic Volcanic Rock with Siliceous Veining
Biotite Schist
Biotite Schist (K(Mg,Fe)3AlSi3O10(OH,F)2)
Gneiss
Gneiss (High-grade metamorphic rock)
Milky Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
Pyrite (on Quartz/Host Rock)
Iron Sulfide (FeS₂)
Pink Quartzite Pebble
Metamorphic Quartzite (SiO2 with iron oxide inclusions)
Greenstone
Greenschist (containing chlorite, epidote, and actinolite)
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of Titanium, Iron, or Manganese
Clear Quartz (Rock Crystal)
Quartz (Silicon Dioxide, SiO2)
Quartz (Milky/Chalcedony variety)
Silicon Dioxide (SiO2)
Pink Sapphire
Corundum (Al2O3) with Chromium/Iron/Titanium trace impurities
Gneiss
Gneiss (High-grade regional metamorphic rock)
Pyrite
Iron Sulfide (FeS2)
Smoky Quartz
Silicon Dioxide (SiO2)
Clear Quartz
Silicon Dioxide (SiO2)
Rutilated Quartz
Silicon Dioxide (SiO2) with Titanium Dioxide (TiO2) inclusions
Garnet (Almandine)
Almandine (Fe3Al2(SiO4)3)
Quartz (likely) / Siliceous rock with quartz phenocrysts (if a rock fragment)
Quartz (SiO₂)
Quartz
Quartz (Silicon Dioxide - SiO2)
Blue Apatite
Apatite group (Ca5(PO4)3(F,Cl,OH))
Diorite Gneiss
Foliated Diorite Gneiss