Potassium Feldspar
Orthoclase (KAlSi3O8)
mineral
Category
Metamorphic Rock
Browse metamorphic rock specimens identified by the Rock Identifier community.
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
mineral
Amethyst
SiO2 (Silicon Dioxide with Iron impurities)
mineral
Banded Agate
Silicon Dioxide (SiO2)
mineral
Orthoclase Feldspar with Quartz
Orthoclase (KAlSi3O8)
mineral
Biotite Mica in Quartz
Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2) in Quartz (SiO2)
mineral
Nephrite Jade
Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2)
metamorphic
Orthoclase Feldspar (Sunstone variety)
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Sodalite
Sodalite - Na8(Al6Si6O24)Cl2
mineral
Blue Sapphire (likely costume glass imitation)
Corundum (Al2O3) with iron/titanium impurities
mineral
Sodalite
Sodium Aluminum Silicate Chloride (Na8(Al6Si6O24)Cl2)
mineral
Ruby in Matrix
Corundum (Al2O3)
mineral
Quartz with Muscovite Mica
SiO2 with KAl2(AlSi3O10)(OH)2
mineral group
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Green Aventurine
Aventurine Quartz (SiO2 with inclusions of Fuchsite)
metamorphic
Quartzite with inclusions
Quartzite (SiO2)
metamorphic
Anthracite Coal
Anthracite (Carbon-rich metamorphic coal)
metamorphic
Quartz Vein in River Siltstone
Crystalline Quartz (SiO2) in Siliclastic Matrix
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Schist
Mica Schist
metamorphic
Yellow Quartz (Citrine/Yellow Chalcedony)
Silicon Dioxide (SiO2)
mineral
Schist
Mica Schist
metamorphic
Muscovite Schist
Muscovite (KAl2(AlSi3O10)(OH)2) in Schist
metamorphic
White Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Garnet Schist
Almandine Garnet Schist
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Schist
Mica Schist
metamorphic
Schist
Mica Schist
metamorphic
Sandstone
Arenite
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Amethyst Quartz
Amethyst (Silicon Dioxide, SiO2)
mineral
Quartz (Agate/Chalcedony variety)
Silicon Dioxide (SiO2)
mineral
Black Mountain Stone (Seiryu Stone)
Limestone with Calcite veins (CaCO3)
sedimentary
Lake Superior Agate
Banded Chalcedony (Silicon Dioxide / SiO2)
mineral
Granite Pebble
Igneous Intrusive Rock (Quartz-Feldspar-Mica Phenocrysts)
igneous
Sandstone
Sandstone (Sedimentary rock composed of silicate grains)
sedimentary
River Rock (Greywacke/Sandstone)
Lithic Wacke
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Red Jasper (Amygdaloidal Basalt with Agate)
Silicon dioxide (SiO2) in Basalt host
igneous
Vesicular Basalt
Extrusive Mafic Igneous Rock (Vesicular Basalt)
igneous