Epidote
Epidote Group (e.g., Clinozoisite, Epidote, Piemontite), Epidote formula: Ca2(Al,Fe)3(SiO4)3(OH)
Mineral
Category
Mineral Group
Browse mineral group specimens identified by the Rock Identifier community.
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Tumbled serpentine
Serpentinite; chiefly serpentine-group minerals, Mg3Si2O5(OH)4
metamorphic
Serpentine
Serpentinite (group of hydrous magnesium iron phyllosilicate minerals)
metamorphic
Serpentinite
Serpentinite (group of hydrous magnesium iron phyllosilicates)
metamorphic
Garnet
Nesosilicate group (e.g., Almandine: Fe3Al2(SiO4)3)
mineral
Basalt
Extrusive Igneous Rock (Mafic)
igneous
Basalt Pebble
Basalt
igneous
Kyanite
Kyanite (Al2SiO5)
Mineral
Fossil Bivalve Shell
Class Bivalvia (e.g., Veneriidae family)
sedimentary
Vesicular Basalt with Zeolite
Mafic volcanic rock with Hydrated Aluminosilicate minerals (Zeolite group)
igneous
Green Apophyllite and Stilbite on Quartz Cluster
Apophyllite-(K) (KCa4(Si8O20)(F,OH)·8H2O), Stilbite-Ca (NaCa4(Si27Al9)O72·28H2O), Quartz (SiO2)
Mineral
Blue Apatite
Apatite (Group), Ca5(PO4)3(F,Cl,OH)
mineral
Basalt (Purple-tinted scoria/vesicular variety)
Extrusive mafic igneous rock (SiO2 range 45–52%)
igneous
Biotite Mica
K(Mg,Fe2+)3(Al,Fe3+)Si3O10(OH,F)2
Mineral
Chondrite
Ordinary Chondrite (L or H group)
meteorite
Chondrite Meteorite
Ordinary Chondrite (L or H Group)
igneous
Garnet Beads
Garnet Group (complex nesosilicates, e.g., Almandine Fe3Al2(SiO4)3)
Mineral
Almandine Garnet
Iron aluminum silicate - Fe3Al2(SiO4)3
metamorphic
Peridotite
Peridotite (composed largely of Olivine (Mg,Fe)2SiO4 and Pyroxene)
igneous
Garnet (Almandine or Pyrope)
Garnet group; (Fe,Mg)3Al2(SiO4)3
gemstone
Garnet
Garnet Group (Silicate mineral); general formula X3Y2(SiO4)3
Mineral
Basalt
Extrusive igneous rock primarily composed of plagioclase and pyroxene
igneous
Blue Apatite
Apatite group (Ca5(PO4)3(F,Cl,OH))
mineral
Olivine (Peridot when gem-quality)
Olivine Group (Magnesium Iron Silicate, (Mg,Fe)2SiO4)
mineral
Olivine (Peridot)
Olivine Group (Magnesium Iron Silicate), (Mg, Fe)2SiO4
mineral
Sodalite
Sodalite (Na4Al3Si3O12Cl)
Mineral
Epidote
Epidote Group (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))
metamorphic
Schist
Mica Schist (Group of medium-grade metamorphic rocks)
metamorphic
Gastropod Fossil (Snail Internal Cast)
Class Gastropoda (Steinkern)
sedimentary
Serpentine
Serpentine Group Minerals (e.g., Antigorite, Chrysotile, Lizardite)
Mineral, often found as a rock
Blue Apatite
Apatite group (Ca5(PO4)3(F,Cl,OH))
mineral
Serpentinite
Serpentinite (a rock composed predominantly of serpentine group minerals)
metamorphic
Quartz Pebble (Quartzite Pebble)
Silicon Dioxide (SiO2)
sedimentary
Banded Serpentine
Serpentine group (subgroup Lizardite or Antigorite) - Mg3Si2O5(OH)4
metamorphic
Serpentine (likely antigorite-rich serpentinite)
Serpentinite; chiefly serpentine-group minerals, Mg₃Si₂O₅(OH)₄, with dark magnetite/chromite or pyroxene inclusions
metamorphic
Garnet (likely Pyrope or Almandine)
Garnet Group (complex nesosilicate minerals, e.g., Pyrope Mg3Al2(SiO4)3, Almandine Fe3Al2(SiO4)3, Spessartine Mn3Al2(SiO4)3, Grossular Ca3Al2(SiO4)3, Andradite Ca3Fe2(SiO4)3, Uvarovite Ca3Cr2(SiO4)3). The vivid red color in the image strongly suggests Pyrope or Almandine.
Mineral
Basalt Pebble
Basalt
igneous
Basalt
Extrusive Igneous Rock
igneous
Basalt
Extrusive Igneous Rock
igneous
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals, Mg3Si2O5(OH)4)
metamorphic
Gastropod Fossil
Phylum Mollusca, Class Gastropoda (Calcium Carbonate, CaCO3)
sedimentary
Serpentine-rich ultramafic rock
Serpentinite (predominantly serpentine-group minerals: lizardite, chrysotile, and/or antigorite)
metamorphic