Epidote
Epidote (Ca2(Al,Fe)3(SiO4)3(OH))
metamorphic
Category
Igneous Or Metamorphic (Base Stone); Anthropogenic (Decoration)
Browse igneous or metamorphic (base stone); anthropogenic (decoration) specimens identified by the Rock Identifier community.
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Peacock Ore
Bornite (Cu5FeS4) or iridescent Chalcopyrite (CuFeS2)
mineral
Granodiorite River Pebble
Granodiorite
igneous
Epidote
Ca2(Al, Fe)3(SiO4)3(OH)
mineral
Likely biotite-bearing metamorphic rock (schist or gneiss)
Mica schist/gneiss; chiefly quartz, feldspar, and biotite mica
metamorphic
Graphite
Graphite (Carbon, C)
mineral
Jasper
Silicon dioxide (SiO2)
sedimentary
Smoky Quartz Cluster
Smoky Quartz (Silicon Dioxide - SiO2)
mineral
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
metamorphic
Black Marble
Recrystallized Limestone (CaCO3)
metamorphic
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
mineral
Pyrite
Iron Pyrite (FeS2)
Mineral
Labradorite (Polished Sphere)
Labradorite ((Ca, Na)(Al, Si)4O8)
mineral
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Muscovite Mica
Muscovite (Potassium Aluminum Silicate) - KAl2(AlSi3O10)(F,OH)2
mineral
Coarse Sand or Fine Gravel
Detrital Sedimentary Fragments (mostly SiO2)
sedimentary
Tumbled quartz-rich stone, possibly blue quartz or granite
Quartz (SiO₂), with probable feldspar and dark accessory minerals
mineral
Basalt River Stone
Aphanitic Mafic Volcanic Rock
igneous
Biotite (Mica)
Biotite (K(Mg,Fe)3AlSi3O10(OH,F)2)
mineral
Chert (Arrowhead/Tool variety)
Microcrystalline Quartz (SiO2)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Chert (specifically Flint Arrowhead)
Silicon dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Gneiss
Gneiss
metamorphic
Granitoid (Granite/Gneiss)
Granitoid silicate rock, primarily quartz and feldspar
igneous/metamorphic
Quartz Vein in Gneiss or Schist
Metamorphic rock with SiO2 vein
metamorphic
Granitic Gneiss
Gneiss (Polymetamorphic Granitic Gneiss)
metamorphic
Muscovite
Muscovite (KAl2(AlSi3O10)(OH)2)
mineral
Muscovite Mica
Muscovite: KAl2(AlSi3O10)(OH)2
mineral
Muscovite Mica
Muscovite - KAl2(AlSi3O10)(F,OH)2
mineral
Ruby / Pink Sapphire
Corundum (Al2O3 with Chromium impurities)
gemstone
Amethyst
Silicon Dioxide with trace Iron (SiO2)
mineral
White Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Biotite Mica
K(Mg, Fe)3(AlSi3O10)(F, OH)2
mineral
Granite Pebble
Granite (Phaneritic intrusive igneous rock)
igneous
Muscovite Mica
KAl2(AlSi3O10)(F,OH)2
mineral
Granite
Phaneritic Intrusive Igneous Rock (primarily Quartz, Feldspar, and Mica)
igneous
Granite fragment
Granite
igneous
Biotite Mica
K(Mg,Fe2+)3(Al,Fe3+)Si3O10(OH,F)2
Mineral
Muscovite Mica
KAl2(AlSi3O10)(F,OH)2
mineral
Venetian Gold Granite
Phaneritic Felsic Igneous Rock (Granite)
igneous
Blue Sapphire
Corundum (Al2O3)
mineral
Concrete
Anthropogenic Sedimentary Rock (Hydrated Calcium Silicate)
sedimentary (anthropogenic / man-made)