Unakite
Epidotized Granite
metamorphic
Category
Metamorphic (Modified)
Browse metamorphic (modified) specimens identified by the Rock Identifier community.
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
metamorphic
Jade (specifically Nephrite or Jadeite beads)
Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2) or Jadeite (NaAlSi2O6)
metamorphic
Blue Sapphire
Corundum (Al2O3 with trace Titanium and Iron)
mineral
Red Quartzite
Metamorphic Quartzite (predominantly SiO2 with iron oxide impurities)
metamorphic
Feldspathic Gneiss
Feldspathic Gneiss (High-grade regional metamorphic rock)
metamorphic
Banded Gneiss
Gneiss (Metamorphic rock composed of feldspar, quartz, and mica)
metamorphic
Anthracite Coal
Anthracite (Carbon-based organic sedimentary/metamorphic rock)
metamorphic
Shungite
Non-crystalline carbon (high-carbon metamorphic rock)
metamorphic
Coal (Anthracite)
Anthracite (Carbon-based organic sedimentary/metamorphic rock)
metamorphic
Quartzite with Iron Inclusions
Metamorphic Silicon Dioxide (SiO2) with impure Limonite/Hematite
metamorphic
Mica Schist
Medium-grade regional metamorphic rock (composition varies)
metamorphic
Schist
Mica Schist (Group of medium-grade metamorphic rocks)
metamorphic
Slate
Metamorphosed Shale (Fine-grained Foliated Metamorphic Rock)
metamorphic
Schist (Biotite/Mica Schist)
Medium-grade regional metamorphic rock (rich in Phyllosilicates)
metamorphic
Fairy Stone (Staurolite Concretion)
Staurolite (Fe2+2Al9Si4O23(OH))
metamorphic
Blue Quartzite (Aventurine)
Quartzite (primarily SiO2) with inclusions of Dumortierite or Magnesio-riebeckite
metamorphic
Quartzite
Quartzite
Metamorphic
Gneiss
Gneiss (High-grade Regional Metamorphism)
metamorphic
Nuummite
Nuummite (Orthoamphibole rock / Anthophyllite-Gedrite blend)
metamorphic
Schist (specifically Chlorite/Greenschist)
Chlorite Schist
metamorphic
Sapphire
Corundum (Al2O3)
mineral
Garnet (Almandine)
Almandine (Fe3Al2(SiO4)3)
Mineral
Mica Schist
Mica Schist (predominantly Muscovite or Biotite sheet silicates)
metamorphic
Schist (Garnet-Mica Schist)
Garnetiferous Mica Schist (primarily Muscovite/Biotite and Almandine Garnet)
metamorphic
Almandine Garnet in Matrix
Almandine (Fe3Al2(SiO4)3)
metamorphic
Schist (Biotite Schist)
Biotite-bearing Schist (K(Mg,Fe)3AlSi3O10(F,OH)2)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Unakite (Tumbled)
Unakite (altered granite)
metamorphic
Lapis Lazuli
Lapis Lazuli (Primary mineral: Lazurite, (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)
metamorphic
Marble (Fire and Ice or Pink Veined)
Metamorphosed Limestone (principally CaCO3)
metamorphic
Dragon Blood Jasper
Epidote-containing Quartz Chalcedony (SiO2 with Ca2(Al, Fe)3(SiO4)3(OH))
metamorphic
Green Quartzite (or Aventurine)
SiO2 (Silicon Dioxide) primarily, with Fuchsite inclusions (K(Al,Cr)2AlSi3O10(OH)2)
metamorphic
Schist
N/A (a rock type, not a mineral formula)
metamorphic
Banded Quartzite
Quartzite (primarily SiO2)
metamorphic
Pink Quartzite
Quartzite (SiO2 with iron oxide inclusions)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Greenstone / Greenstone Pebble
Greenschist (metamorphosed basalt or gabbro)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic