Glauconite (Glauconitic Sandstone)
Glauconite [(K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2]
Category
Browse mineral (evaporite) specimens identified by the Rock Identifier community.
Glauconite (Glauconitic Sandstone)
Glauconite [(K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2]
Greenschist (Greenstone)
Greenschist (Metamorphic rock containing chlorite, actinolite, and epidote)
Coprolite
Coprolite
Chrysocolla (with Quartz and Azurite)
Hydrated copper phyllosilicate mineral [Cu2-xAlx(H2-xSi2O5)(OH)4·n(H2O)]
Lava Stone and Chakra Beads
Basalt (with various mineral/synthetic beads)
Gneiss (Augen Gneiss)
Augen Gneiss
Quartzite with inclusions
Metamorphic Quartzite (SiO2 with accessory minerals)
Tumbled Green Jasper
Silicon Dioxide (SiO2) with mineral inclusions
Blue Sapphire (Faceted)
Corundum (Al2O3)
Milky Quartz Chip
Silicon Dioxide (SiO2)
Green Aventurine
SiO2
Basalt with Amygdules
Amygdaloidal Basalt
Fossilized Shark Tooth (Otodus obliquus)
Otodus obliquus (composed primarily of Fluorapatite)
Barite
Barium Sulfate (BaSO4)
Pyrite
Iron Sulfide (FeS2)
Bornite (Peacock Ore)
Bornite (Cu5FeS4)
Prehnite
Prehnite (Ca2Al(AlSi3O10)(OH)2)
Granite
Granite (a common igneous rock)
Lapis Lazuli (Tumbled Stone)
Na6Ca2(Al6Si6O24)(SO4,S,Cl)2 (Lazulite-rich Metamorphic Rock)
Gneiss
Gneiss (pronounced 'nice')
Diorite
Diorite (intermediate intrusive igneous rock)
Granite
Granite (High-silica plutonic rock)
Gneiss
Gneiss (High-grade Metamorphic Rock)
Gneiss with Orthoclase Feldspar
Gneissic Metamorphic Rock with K-Feldspar inclusions
Ruby (varieties of Corundum)
Aluminum oxide (Al2O3) with Chromium traces
Bronzite
MgSiO3 (Enstatite with 10-30% FeSiO3 in solid solution)
Granite Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
Banded Slate
Slate (Metamorphosed Siltstone/Mudstone)
Pyrite and Quartz Agglomerate
Iron Sulfide (FeS2) with Silicon Dioxide (SiO2)
Granite
Granite (Felsic Plutonic Rock)
Granite
Granite (Phaneritic igneous rock)
Schist
Mica Schist
Granite
Phaneritic plutonic rock (SiO2 + Al2O3)
Green Aventurine
Quartz containing Fuchsite (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)
Chalcedony on Ironstone
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3/FeOOH)
Granite
Phaneritic Intrusive Igneous Rock (primarily Quartz, Feldspar, and Mica)
Stromatolite
Stromatolite (Cyanobacteria-formed Organo-sedimentary structure)
Blue Quartzite
Quartzite (mostly SiO2 with mineral inclusions)
Rutilated Prehnite
Prehnite - Ca2Al(AlSi3O10)(OH)2 with Epidote/Tourmaline inclusions
Gneiss
Gneiss
Planet Earth
Gaia (Silicate Terrestrial Planet)
Sandstone (Red)
Arenite (primarily Quartz, SiO2, with Iron Oxide cement)