Epidote
Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
Mineral
Category
Sedimentary And Metamorphic Minerals
Browse sedimentary and metamorphic minerals specimens identified by the Rock Identifier community.
Puddingstone
Conglomerate (specifically a type of jasper conglomerate or quartz conglomerate)
Sedimentary
Anthracite Coal
Anthracite (Carbon-rich metamorphic coal)
sedimentary
Bronzite
MgSiO3 (Enstatite with 10-30% FeSiO3 in solid solution)
Mineral
Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)
mineral
Moonstone
Orthoclase Feldspar ((K,Na)AlSi3O8)
mineral
Hypersthene
Hypersthene (formula: (Mg,Fe)SiO3)
mineral
Green Aventurine in Host Rock
SiO2 (Quartz with Fuchsite inclusions)
mineral
Green Aventurine
Aventurine Quartz (SiO2)
mineral
Bornite (Peacock Ore)
Bornite (Cu5FeS4)
mineral
Specular Hematite (Specularite) in Matrix
Specularite (Fe2O3)
mineral
Honey Calcite (Yellow Calcite)
Calcium Carbonate (CaCO3)
mineral
Cream Marble (Speckled)
Metamorphosed Limestone (mainly CaCO3)
metamorphic
Epidote (with Quartz and Feldspar)
Epidote (unakalite/unite), Ca2(Al2Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
White Marble
Recrystallized Calcite (CaCO3)
metamorphic
Green Aventurine
Aventurine Quartz (SiO2 + Fuchsite inclusions)
mineral
Jasper
Chalcedony (cryptocrystalline quartz), SiO2
Sedimentary
Fuchsite
Chromium-bearing Muscovite - K(Al,Cr)2(AlSi3O10)(OH)2
mineral
Honey Calcite
Calcium Carbonate (CaCO3)
mineral
Prasiolite and Quartz Crystal Cluster
Quartz (SiO2); Prasiolite is a variety of Quartz
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Green Aventurine
Aventurine Quartz (SiO2 + Fuchsite mica)
Mineral
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
mineral
River Pebbles (Sandstone and Quartzite)
SiO2 (Quartz) dominated clastic rocks
sedimentary and metamorphic
Tiger's Eye
Silicon dioxide (SiO2) with fibrous inclusions of crocidolite
Mineral
Petrified Wood
Silicified Wood (primarily SiO2)
sedimentary
Shale
Fissile Mudstone (primarily composed of clay minerals and quartz grains)
sedimentary
Schist
Mica Schist
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Smoky Quartz
SiO2 (Silicon Dioxide)
Mineral
Amethyst
Quartz (SiO2) variety
Mineral
Banded Onyx (Green Onyx)
Banded Calcite or Travertine (CaCO3)
Sedimentary
Banded Agate
Cryptocrystalline variety of Quartz (SiO2)
mineral
Aventurine
Silicon Dioxide (SiO2) with inclusions
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxide inclusions)
metamorphic
Prehnite
Prehnite (Ca2Al(AlSi3O10)(OH)2)
mineral
Natural Gemstone Cabochons (Ruby, Moonstone, Emerald, Citrine)
Ruby (Al2O3:Cr), Moonstone (KAlSi3O8), Emerald (Be3Al2(SiO3)6:Cr), Citrine (SiO2)
mineral
Shale with Vein Infillings
Shale (a fine-grained clastic sedimentary rock). The veins could be Calcite (CaCO3), Quartz (SiO2), or other minerals.
Sedimentary Rock
Micaceous Sandstone or Quartzite
Sandstone (lithified quartz grains, often with mica) or Quartzite (metamorphosed sandstone)
Sedimentary or Metamorphic
Orange Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxide inclusions)
metamorphic