Gneiss (Banded Gneiss)
Gneiss
Category
Browse mineral (metamorphic pseudomorph) specimens identified by the Rock Identifier community.
Gneiss (Banded Gneiss)
Gneiss
Sunstone Beads
Feldspar group (Oligoclase / Labradorite)
Milky Quartz with Mica
Silicon Dioxide (SiO2) with Muscovite or Biotite inclusions
Quartz Pebble
Silicon Dioxide (SiO2)
Citrine
Silicon Dioxide (SiO2)
Sunstone
Oligoclase (Plagioclase Feldspar subclass), (Ca,Na)(Al,Si)4O8
Biotite on Quartz Matrix
Biotite - K(Mg,Fe)3(AlSi3O10)(OH,F)2 with Quartz (SiO2)
Ruby Zoisite
Anyolite (Composition of Green Zoisite, Black Tschermakite, and Red Corundum)
Seraphinite
Clinochlore (Mg,Fe)5Al(AlSi3O10)(OH)8 - specific variety for Seraphinite due to its fibrous inclusions and chatoyancy.
Garnet in Quartzite
Garnet-bearing Quartzite (SiO2 + X3Y2(SiO4)3)
Quartz-veined Metamorphic Rock
Quartz-veined Schist or Gneiss
Serpentine
Antigorite, Lizardite, and Chrysotile (Mg3Si2O5(OH)4)
Lapis Lazuli
Na8(Al6Si6O24)S2 (Lazurite is the primary constituent mineral)
Muscovite Schist
Muscovite (KAl2(AlSi3O10)(OH)2) in Schist
Pyrite
Iron Sulfide (FeS2)
Black Tourmaline (Schorl)
Schorl (Complex sodium iron aluminum borosilicate)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Biotite / Black Mica
K(Mg,Fe)3(AlSi3O10)(F,OH)2
Smoky Quartz
Smoky Quartz (SiO2)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Quartz
Silicon Dioxide (SiO2)
Dark gray slate (possibly argillite or shale)
Slate, a low-grade metamorphic rock derived mainly from shale; composition commonly quartz, illite/muscovite, chlorite, and clay minerals
Gneiss
Gneiss (High-grade metamorphic rock)
Gneiss
Gneiss
River Stones (Quartzite and Sandstone)
Quartzite / Sedimentary Rock (SiO2 dominant)
Mica Schist with Garnet
Garnet-Mica Schist
Milky Quartz
Crystalline Quartz (SiO2)
Quartzite Pebble
Metamorphic Quartzite (SiO2)
Slate
Slate (Metamorphic Rock)
Clear Quartz
Silicon Dioxide (SiO2)
Clear Quartz Crystal
Silicon Dioxide (SiO2)
Clear Quartz
Silicon Dioxide (SiO2)
Magnetite or Hematite-rich Ore
Magnetite (Fe3O4) or Hematite (Fe2O3)
Sapphire (Rough Corundum)
Corundum (Aluminum Oxide, Al2O3)
Ruby (set in a gold pendant)
Ruby (Variety of Corundum, Al2O3)
Banded Gneiss
Gneiss (Metamorphic silicate rock)
Banded Gneiss River Pebble
Gneiss
White Marble (Tumbled)
Recrystallized Calcite (CaCO3)
Granite Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
Schist
Mica Schist