Turquoise
CuAl6(PO4)4(OH)8·4H2O (Hydrous phosphate of copper and aluminium)
Category
Browse mineral (evaporite) specimens identified by the Rock Identifier community.
Turquoise
CuAl6(PO4)4(OH)8·4H2O (Hydrous phosphate of copper and aluminium)
Chalcopyrite
Copper Iron Sulfide (CuFeS2)
Quartz Geode
Silicon Dioxide (SiO2)
Quartz Geode
Quartz (Silicon Dioxide, SiO2) in a Geode
Sandstone
Arenite (SiO2 primarily)
Blue Quartz (Dumortierite Quartz)
SiO2 containing inclusions of Dumortierite [Al7(BO3)(SiO4)3O3]
Fuchsite
Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)
Gneiss
Gneiss
Gneiss
Gneiss (a type of metamorphic rock)
Pink Granite
Felsic Plutonic Rock (primarily Quartz, Potassium Feldspar, and Plagioclase)
Shark Tooth Fossil
Elasmobranchii dentition (fossilized)
Greenschist
Greenschist (composed of Chlorite, Actinolite, and Epidote)
Blue Calcite
Calcium Carbonate (CaCO3)
Red Vanadinite on Matrix
Vanadinite (Pb5(VO4)3Cl)
Schist
Mica Schist (primarily Muscovite and Biotite)
Sandstone Beach Pebble
Clastic sedimentary rock (SiO2 with iron oxide cement)
Greenschist
Greenschist (Chlorite-Epidote-Actinolite Schist)
Milky Quartz Pebble
Silicon Dioxide (SiO2)
Diamond
Diamond (Pure Carbon - C)
Diamond
Diamond (C)
Diamond
Carbon (C)
Quartz (Water-worn Pebble)
Quartz (Silicon Dioxide, SiO2)
Gold and Diamond
Native Gold (Au) and Diamond (C)
Diamond
Carbon (C)
Raw Diamond
Carbon (C)
Petrified Wood
Silicified Wood (SiO2)
Basalt with Quartz/Calcite Veins
Extrusive mafic igneous rock with hydrothermal mineralization
Shale
Shale (comprised mostly of clay minerals and quartz)
Prehnite on Basalt
Prehnite - Ca2Al(AlSi3O10)(OH)2
Chrysocolla on Quartz
Chrysocolla (Cu2−xAlx(H2−xSi2O5)(OH)4·nH2O) often associated with Quartz (SiO2)
Biotite Granite
Phaneritic Felsic Igneous Rock
Chalcedony or Chert/Jasper with secondary mineral staining
SiO2 (for chalcedony/quartz) with possible secondary copper minerals (e.g., CuSiO3·nH2O for chrysocolla, Cu2(CO3)(OH)2 for malachite) or iron oxides/hydroxides.
Breccia
Breccia (Clastic Sedimentary Rock)
Basalt
Basalt (Mafic volcanic rock)
Schist
Mica Schist
Basalt
Extrusive mafic volcanic rock
Granite
Phaneritic Igneous Rock (Granite)
Quartzite
Quartzite (primarily SiO2)
Granite (Weathered)
Phaneritic Felsic Igneous Rock
Granite
Granite (Phaneritic igneous rock consisting of Quartz, Feldspar, and Mica)
Granite Pebble
Granite (Phaneritic intrusive igneous rock)
Granite
Phaneritic Igneous Rock (Granite)