Anthracite Coal
Low-grade metamorphic carbonaceous rock
Category
Browse metamorphic rock (for both nephrite and jadeite) specimens identified by the Rock Identifier community.
Anthracite Coal
Low-grade metamorphic carbonaceous rock
Banded Gneiss
Gneiss (Metamorphic high-grade rock)
Gneiss
Gneiss (High-grade metamorphic rock)
Banded Gneiss (with Quartz Vein)
Gneiss (Metamorphic rock of varying mineralogy)
Gneiss
High-grade foliated metamorphic rock
Banded Gneiss (River Cobble)
Gneiss (a high-grade metamorphic rock)
Gneiss
Gneiss (High-grade metamorphic rock)
Gneiss
Gneiss (High-grade Metamorphic Rock)
Gneiss
Gneiss (High-grade Metamorphic Rock)
Garnet (almandine or pyrope variety)
Silicate mineral Group: (Fe, Mg, Mn, Ca)3(Al, Fe, Cr)2(SiO4)3
Ferruginous Quartzite (Iron-stained Quartzite)
Quartzite with Iron oxides (FeO(OH) / Fe2O3)
Lapis Lazuli (polished cabochon/sphere)
Na8[Al6Si6O24]Sn with accessory minerals (Pyrite, Calcite)
Clay Brick
Ceramic structural unit (Al2O3·2SiO2·2H2O as precursor)
Greenstone
Greenschist / Greenstone (containing Chlorite, Epidote, Actinolite)
Unakite
Epidotized Granite
Schist with Quartz Vein
Mica Schist with Crystalline Quartz (SiO2)
Quartzite pebble
Quartzite (SiO2)
White Marble
Recrystallized Calcite (CaCO3) / Marble
White Quartzite
Quartzite (primarily SiO2)
Garnet Schist or Garnet-bearing Quartzite
Metamorphic rock containing Almandine Garnet (Fe3Al2(SiO4)3) and Quartz (SiO2)
Quartz (Milky Quartz/Citrine Type)
Silicon Dioxide (SiO2)
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxide inclusions)
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
Quartzite River Rock
Quartzite (primarily SiO2)
Gneiss
Gneiss (High-grade regional metamorphic rock)
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
Blue Quartzite
Quartzite (primarily SiO2 with inclusions like Dumortierite or Magnesio-riebeckite)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Serpentinite
Serpentinite (complex silicate of magnesium, (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4)
Quartzite
Quartzite (SiO2)
Mica Schist
Mica Schist (Quartz-Biotit-Muscovite Schist)
Quartzite (River Pebble)
Quartzite (composed primarily of Silica, SiO2)
Clear Quartz / Rock Crystal
Silicon Dioxide (SiO2)
Tiger's Eye (Mineral Collection)
Tiger's Eye (SiO2 with crocidolite inclusions)
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
Green Opal
Hydrated Silica (SiO2·nH2O)
Serpentine
Serpentinite (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4
Blue Apatite
Apatite - Ca5(PO4)3(F,Cl,OH)
Garnet
Almandine (Fe3Al2(SiO4)3)
Quartzite
Metamorphosed Quartz Sandstone (SiO2)
Ruby in Zoisite
Ruby (Corundum, Al2O3) in Zoisite (Calcium aluminum silicate hydroxide, Ca2Al3(SiO4)3(OH)) with some Hornblende
Basalt (Porphyritic)
Basalt (Mafic Extrusive Igneous Rock)