Epidote
Epidote Group (e.g., Clinozoisite, Epidote, Piemontite), Epidote formula: Ca2(Al,Fe)3(SiO4)3(OH)
Mineral
Category
Minerals
Browse minerals specimens identified by the Rock Identifier community.
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Garnetiferous Quartzite (Garnet Gneiss Pebble)
Garnet-bearing Quartzite or Quartz-Feldspar Gneiss
metamorphic
Greenstone / Diabase Porphyry
Porphyritic Diabase (Micro-gabbro)
Igneous
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Chrysocolla Cuprite
Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (Chrysocolla) and Cu2O (Cuprite)
mineral composite
Schist
Schist
Metamorphic
Basalt Porphyry
Porphyritic Basalt
igneous
Dinosaur Bone (Fossilized)
Permineralized Bone (CaCO3 or SiO2 after Hydroxylapatite)
sedimentary
Greenschist
Greenschist (containing Chlorite, Epidote, and Actinolite)
metamorphic
Orange Calcite
Calcite (CaCO3)
Mineral
Sulfur (on Matrix)
Native Sulfur (S8)
mineral
Greenstone or Epidote-rich Metamorphic Rock
Chlorite/Epidote Schist or Greenstone
metamorphic
Petrified Wood
Silicified Wood (primarily Quartz / Chalcedony: SiO2)
sedimentary
Greenstone / Greenschist
Chlorite schist / Epidiorite
metamorphic
Granite
Granite
igneous
Diamond in Kimberlite
Kimberlite Matrix with Carbon (Diamond)
igneous
Granite
Granite
Igneous
Granite
Granite
Igneous
Turquoise
Turquoise, CuAl6(PO4)4(OH)8·4H2O
mineral
Greenstone / Greenschist
Greenschist facies metamorphic rock
metamorphic
Schist
Schist (Crystalline metamorphic rock)
metamorphic
Limonite (Yellow Ochre)
Hydrated iron(III) oxide-hydroxides (FeO(OH)·nH2O)
mineral
Limonite (Iron Ore)
Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)
mineral
Mixed Gemstone Collection
SiO2 (Quartz varieties) and Biogenic CaCO3 (Nacre)
mineral
Assorted Decorative Tumbled Stones (Quartz, Sodalite, Aventurine, Calcite)
Mixed Silicates and Carbonates (SiO2, Na8(Al6Si6O24)Cl2, CaCO3)
mineral
Moonstone (bead form)
Potassium Aluminum Silicate (KAlSi3O8) - a variety of Orthoclase Feldspar
Mineral
Granite Pebble
Granite (Felsic Plutonic Rock)
igneous
Geode (Unopened)
Silicon Dioxide (SiO2) in sedimentary vugs
sedimentary
Garnet Schist
Almandine Garnet Schist (Fe3Al2(SiO4)3 in Schistose matrix)
metamorphic
Quartz (Milky/Clear)
Silicon Dioxide (SiO2)
mineral
Garnet-Bearing Gneiss
Almandine-Garnet Gneiss
metamorphic
Feldspar (Orthoclase)
Potassium Alveolar Silicate (KAlSi3O8)
mineral
Pegmatite (Granitic)
Granitic Pegmatite containing Quartz, Feldspar, and Tourmaline (Schorl)
igneous
Quartz on Feldspar
Silicon Dioxide (SiO2) with Potassium Feldspar (KAlSi3O8)
igneous
Granite Pebble
Granite (Phaneritic Quartz-Feldspar Rock)
igneous
Strawberry Quartz (Quartz with Hematite inclusions)
Silicon Dioxide with Iron Oxide (SiO2 + Fe2O3)
mineral
Fossil Shark Tooth
Otodus sp. or Carcharocles sp. (likely fossilized Chondrichthyes)
fossil
Quartz Druzy on Matrix (with Copper Mineralization)
Silicon Dioxide (SiO2) with Chrysocolla (Cu2-xAlx(H2-xSi2O5)(OH)4·n H2O)
mineral
Greenstone (Epidote/Chlorite-rich Metabasalt)
Greenschist / Epidosite (Ca2(Al,Fe)3(SiO4)3(OH))
metamorphic
Serpentinite
Serpentinite (composed primarily of serpentine-group minerals like antigorite, chrysotile, and lizardite; chemical formula varies but generally Mg3Si2O5(OH)4)
Metamorphic Rock
Olivine (Peridot when gem-quality)
Olivine Group (Magnesium Iron Silicate, (Mg,Fe)2SiO4)
mineral
Quartz-Veined Mudstone
Argillaceous Mudstone with Quartz Veining
sedimentary