Anthracite Coal
Anthracite (high-rank coal)
Category
Browse metamorphic and sedimentary specimens identified by the Rock Identifier community.
Anthracite Coal
Anthracite (high-rank coal)
Blue Kyanite
Kyanite (Al2SiO5)
Red Jasper (Quartzite)
Silicon Dioxide (SiO2) with iron oxide inclusions
Quartz
Silicon Dioxide (SiO2)
Petrified Wood
Silicified Wood (SiO2)
Marble
Metamorphosed Limestone (main mineral: Calcite, CaCO3)
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
Gneiss
Gneiss
Zebra Jasper
Tectonized Jasper (Silicon Dioxide, SiO2)
Black Sand (Magnetite Sand)
Magnetite-rich Placers (Fe3O4)
Calcite
Calcium Carbonate (CaCO3)
Epidote
Epidote; Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
Banded Gneiss
Gneiss (High-grade regional metamorphic rock)
Banded Gneiss
Gneiss (High-grade regional metamorphic rock)
Green Slate (Greenstone)
Foliated Metamorphic Rock (rich in Chlorite/Epidote)
Pyrite (Fools Gold)
Iron Sulfide (FeS2)
Banded Gneiss
Gneiss
Gneiss
Gneiss
Gneiss (specifically Granitic Gneiss)
Gneiss (composed primarily of Quartz, Feldspar, and Biotite/Amphibole)
Granite Gneiss
Gneiss (quartz-feldspar dominated)
Mica Schist with Pyrite
Muscovite/Biotite Schist (Complex Silicate)
Gneiss (specifically Banded Gneiss)
Gneiss
Granite Gneiss
Felsic Gneiss
Gneiss
Gneiss
Gneiss
Gneiss
Aventurine Quartz
Silicon Dioxide (SiO2) with inclusions (typically Fuchsite mica)
Schist with Quartz
Mica Schist (contains Muscovite/Biotite and Quartz SiO2)
Gneiss (Banded Gneiss)
Gneiss
Gneiss
Gneiss
Gneiss
Gneiss
Green Aventurine
Silicon Dioxide (Quartz) with inclusions of Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)
Garnet Schist
Garnetiferous Mica Schist
Banded Gneiss
Gneiss (Metamorphic rock of variable mineralogy, often quartz-feldspar base)
Quartz Pebble
Crystalline Silica (SiO2)
Banded Agate (with possible Chalcedony layers)
Silicon dioxide (SiO2)
Schist with Biotite Inclusion
Biotite-bearing Mica Schist (K(Mg,Fe)3AlSi3O10(F,OH)2)
Banded Gneiss and Siltstone River Stones
Gneiss (High-grade Metamorphic Rock)
Anthracite Coal
Anthracite (Carbon-rich metamorphic rock)
Gneiss
High-grade foliated metamorphic rock
Marble
Metamorphosed Limestone/Dolomite
Gneiss (specifically a weathered or stream-worn specimen)
Gneiss (Foliated Metamorphic Rock)