Quartzite (Quartz sand or Chert)
Quartzite (SiO2)
metamorphic
Category
Igneous, Metamorphic, And Sedimentary
Browse igneous, metamorphic, and sedimentary specimens identified by the Rock Identifier community.
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Garnet (Almandine)
Almandine, Fe3Al2(SiO4)3
metamorphic
Garnet Schist or Garnet-bearing Quartzite
Metamorphic rock containing Almandine Garnet (Fe3Al2(SiO4)3) and Quartz (SiO2)
metamorphic
Biotite Schist with Garnet
Garnet-Biotite Schist
metamorphic
Drill Core Samples (Varied Lithology)
Multi-lithological core samples (containing potential granite, marble, and phyllite/schist sequence)
igneous, sedimentary, and metamorphic
Slate
Slate (foliated metamorphic rock)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Green Aventurine
Silicon Dioxide (Quartz) with Fuchsite inclusions (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)
metamorphic
Garnet Schist
Almandine-bearing Mica Schist
metamorphic
Biotite Schist
Schist (Biotite-dominated)
metamorphic
Quartzite
Quartzite (primarily SiO2)
metamorphic
Marble
Recrystallized Calcite (CaCO3)
metamorphic
Slate
Foliated Metamorphic Rock (primarily composed of quartz, illite, and chlorite)
metamorphic
Schist with Schorl (Black Tourmaline)
NaFe3Al6(BO3)3Si6O18(OH)4 (Schorl)
metamorphic
Banded Marble
Recrystallized Calcite (CaCO3)
metamorphic
Gneiss (Granitic Gneiss)
Gneiss
metamorphic
Citrine Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Water-worn pebble)
Silicon Dioxide (SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Smoky Quartz with Iron Inclusions
Silicon Dioxide (SiO2)
mineral
Blue Sapphire
Corundum (Al2O3)
mineral
Sapphire
Corundum (Al2O3)
mineral
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Sunstone
Aventurine Feldspar ((Ca,Na)(Al,Si)4O8)
mineral
Smoky Quartz and Clear Quartz Geode
Silicon Dioxide (SiO2)
mineral
Smoky Quartz
Smoky Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Emerald in Matrix
Emerald (Beryllium Aluminum Silicate), Be3Al2(SiO3)6
mineral
Quartz (River Pebble)
Silicon Dioxide (SiO2)
mineral
White Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Aventurine
Aventurine Quartz (SiO2 + Fuchsite mica)
mineral
Smoky Quartz
SiO2 (Silicon Dioxide)
mineral
Yellow Quartz (Citrinated Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz Pebble (Iron-Stained)
Silicon Dioxide (SiO2)
mineral
Agate
Banded Chalcedony (SiO2 - Silicon Dioxide)
mineral
Peacock Ore (Chalcopyrite/Bornite)
Bornite (Cu5FeS4) or iridescent treated Chalcopyrite (CuFeS2)
Mineral
Quartz (Citrine)
Silicon Dioxide (SiO2)
mineral
White Quartz Pebble (with possible Quartz Geode cavity)
Silicon Dioxide (SiO2)
mineral
Milky Quartz (Quartz Vein)
Silicon Dioxide (SiO2)
mineral
Smoky Quartz
Smoky Quartz (SiO2 - Silicon Dioxide with aluminum impurities)
mineral
Pyrite (Fool's Gold) in Matrix
Iron Disulfide (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral