Coal (Anthracite)
Anthracite (Carbon-based organic sedimentary/metamorphic rock)
Category
Browse metamorphic or sedimentary specimens identified by the Rock Identifier community.
Coal (Anthracite)
Anthracite (Carbon-based organic sedimentary/metamorphic rock)
Graphite
Graphite (Chemical Formula: C)
Garnet
Almandine (Fe3Al2(SiO4)3)
Jasper Conglomerate (Puddingstone)
Siliceous Conglomerate (Quartz and Jasper clasts in a fine-grained matrix)
River Cobble (Gneiss/Migmatite)
Gneissic Metamorphic Rock (composed mainly of Quartz, Feldspar, and Biotite)
Quartz Pebble
Silicon Dioxide (SiO2)
Grey River Stone (Gneiss/Schist mix)
Foliated Metamorphic Rock (variable mineral formula)
Quartzite (Banded)
Metamorphosed Sandstone (SiO2 with impurities)
Blue Kyanite
Kyanite (Al2SiO5)
Magnetite or Magnetic Iron Ore
Magnetite (Fe3O4)
Graphite
Graphite (Native Carbon, C)
Marble (Carrara style)
Recrystallized Calcite-rich Metamorphic Rock (CaCO3)
Gneiss
High-grade regional metamorphic rock (Foliated)
Banded Gneiss
Gneiss (high-grade metamorphic silicate rock)
Gneiss
Gneiss
Marble
Recrystallized Calcite (CaCO3)
Yellow Quartzite (River Stone)
Quartzite (primarily SiO2)
Quartzite with Chert inclusions
Metamorphosed Quartz-rich Rock (SiO2)
Gneiss (High-Grade Metamorphic Rock)
Gneiss (primarily composed of Quartz, Feldspar, and Mica/Amphiboles)
Biotite Schist
Biotite-rich Schist
Mica Schist
Mica Schist (primarily Muscovite and Biotite KAl2(AlSi3O10)(OH)2)
Adventurine (Green)
Silicon Dioxide (SiO2) with inclusions of Fuchsite
Mica Schist
Mica Schist (Composition typically contains Muscovite: KAl2(AlSi3O10)(OH)2 or Biotite: K(Mg,Fe)3AlSi3O10(OH)2 along with Quartz and Feldspar)
Feldspar-rich Quartzite
Meta-arkose (Quartz-Feldspar Quartzite)
Quartzite Pebble (River Rock)
Quartzite (mainly SiO2)
Quartzite Pebble (River Rock)
Quartzite (SiO2)
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
Quartzite
Quartzite (primarily SiO2)
Pyrite
Iron Sulfide (FeS2)
Granite Gneiss with Garnet
Garnetiferous Gneiss
Banded Gneiss
Gneiss (High-grade Metamorphic Rock)
Gneiss
Gneiss (High-grade Metamorphic Rock)
Gneiss
Gneiss
Green Aventurine
Aventurine Quartz (SiO2 with Fuchsite inclusions)
Granite Gneiss
Granitic Gneiss
Gneiss
Gneiss
Gneiss (Cobble)
Gneiss
Quartz-veined Gneiss
Gneiss with Quartz (SiO2) intrusions
Gneiss (specifically Banded Gneiss)
Gneiss
Banded Gneiss
Gneiss (Metamorphic high-grade, predominantly SiO2, Al2O3, K2O, Na2O)
Pietersite
Brecciated Crocidolite in Quartz (Chalcedony)