Gneiss
Gneiss (Metamorphic rock)
Category
Browse mineral (synthetic) specimens identified by the Rock Identifier community.
Gneiss
Gneiss (Metamorphic rock)
Granitic Gneiss
Gneiss (Metamorphic rock of granitic composition)
Granite
Phaneritic Plutonic Felsic Rock (SiO2, KAlSi3O8, NaAlSi3O8, CaAl2Si2O8)
Gneiss
Metamorphic Gneiss (High-grade regional metamorphism)
Fluorite Tower
Fluorite (Calcium Fluoride - CaF2)
Sandstone with Manganese Dendrites
Clastic Sedimentary Rock (SiO2 based with MnO2 inclusions)
Yellow Ochre / Limonite
Hydrated ferric oxide (FeO(OH)·nH2O)
Sandstone (with Limonite staining)
Arenite (primarily SiO2 with FeO(OH)·nH2O)
Banded Sandstone (River Cobble)
Arenite Sandstone with heavy mineral layering
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
Marble
Recrystallized Calcite (CaCO3)
Turquoise
Turquoise, CuAl6(PO4)4(OH)8·4H2O
Gneiss (Cobble)
Gneiss
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
Schist
Schist (various mineral compositions)
Morganite and Aquamarine (Beryl) Bracelet
Beryllium aluminum silicate, Be3Al2(SiO3)6
Bicolor Quartz Tumble
Silicon Dioxide (SiO2)
Gneiss (foliated metamorphic rock)
Gneiss
Turquoise
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
Azurite with Malachite
Azurite: Cu3(CO3)2(OH)2 / Malachite: Cu2CO3(OH)2
Epidote
Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))
Azurite in Matrix
Azurite (Cu3(CO3)2(OH)2)
Granite Gneiss
Gneiss (high-grade metamorphic rock)
Sandstone (likely Arkosic or Lithic)
Clastic Sedimentary Rock (SiO2 with accessory minerals)
Magnetite
Magnetite (Fe3O4)
Granitic Gneiss
Gneiss (High-grade metamorphic rock)
Gneiss
Gneiss
Gneiss
Gneiss
Granite
Phaneritic Felsic Igneous Rock
Mixed Mineral Collection (Quartz, Amethyst, Rose Quartz, Pyrite, etc.)
Mixed Silicates and Sulfides (SiO2, FeS2)
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
Epidote
Calcium aluminum iron silicate (Ca2(Al, Fe)3(SiO4)3(OH))
Epidote
Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))
Mixed Mineral and Fossil Collection
Multi-specimen assemblage (SiO2, CaCO3, FeS2, etc.)
Sandstone with Iron Concretion
Arenite with Limonite/Goethite Concretion
Bornite (Peacock Ore)
Bornite (Cu5FeS4)
Greenstone / Epidosite
Epidosite (primary minerals: Epidote and Quartz)
Green Jasper
Silicon Dioxide (SiO2) with mineral inclusions
Limonite Concretion
Limonite (FeO(OH)·nH2O) Pseudomorph
Limonite (Iron Ore)
Hydrated ferric oxide mixture (FeO(OH)·nH2O)
Eudialyte
Na15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2
Fluorite (specifically Blue John or Banded Fluorite)
Calcium Fluoride (CaF2)