Banded Gneiss
Metamorphic Gneiss (High-grade regional metamorphism specimen)
metamorphic
Category
Igneous Or Metamorphic
Browse igneous or metamorphic specimens identified by the Rock Identifier community.
Learn about Igneous Or Metamorphic in the encyclopedia
View all →
Quartz-rich metamorphic rock (likely mica schist or gneiss)
Quartz–feldspar–mica assemblage; probable biotite schist/gneiss
metamorphic
Garnet (Red Garnet)
Garnet Group. The red varieties seen in jewelry are typically Almandine (Fe3Al2(SiO4)3), Pyrope (Mg3Al2(SiO4)3), or a mix of the two (pyrope-almandine series).
Mineral (specifically, a variety of the mineral species Pyrope-Almandine Garnet)
Beryl (var. Aquamarine/Blue Beryl) in Quartz Matrix
Beryllium Aluminum Silicate (Be3Al2Si6O18)
mineral
Greenstone (Greenschist)
Greenschist facies rock (containing chlorite, epidote, actinolite)
metamorphic
Biotite (Black Mica) in Host Rock
K(Mg,Fe)3AlSi3O10(OH,F)2
mineral
Schist
Mica Schist
metamorphic
Micaceous Rock (likely Muscovite Schist/Gneiss or a Muscovite-rich Specimen)
Predominantly Muscovite (KAl2(AlSi3O10)(F,OH)2), often found in rocks like Muscovite Schist or Muscovite Gneiss.
Metamorphic, Mineral (within a rock type)
Banded Gneiss with Quartz Vein
Foliated Metamorphic Rock (Gneiss)
metamorphic
Muscovite Mica
Muscovite KAl2(AlSi3O10)(OH)2
mineral
Graphite
Graphite (Chemical Formula: C)
Mineral (Native Element)
Garnet
Almandine (Fe3Al2(SiO4)3)
mineral
Yellow Aventurine
Quartz (SiO2) with inclusions
mineral
Greenstone with Pyrite inclusions
Greenschist / Meta-volcanic rock with Iron Disulfide (FeS2)
metamorphic
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Greenstone
Epidiorite / Altered Basalt
metamorphic
Gneiss
Gneiss
metamorphic
Greenstone / River Jadeite pebble
Metavolcanic rock / Chlorite or Actinolite-rich schist
metamorphic
Banded gneiss (likely amphibolite-rich gneiss)
Banded gneiss; composition commonly quartz, feldspar, mica and/or amphibole
metamorphic
Dragon Stone (Dragon Blood Jasper)
Epidote with Pietersite or Red Jasper inclusions (varied SiO2 and Ca2(Al,Fe)3(SiO4)3(OH))
metamorphic
Epidote
Epidote (formula: Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))
mineral
Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Gneiss (specifically Micaceous Gneiss)
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Greenstone / Greenschist
Greenschist facies metamorphic rock (composed primarily of chlorite, actinolite, and epidote)
metamorphic
Unidentified gray stone
Likely quartz-rich stone; exact identification is not possible from the image
mineral
Tumbled or naturally etched mica-rich mineral specimen, likely muscovite
Muscovite, KAl₂(AlSi₃O₁₀)(OH)₂; possibly phlogopite mica
mineral
Yellow Sapphire
Corundum (Al2O3:Fe)
gemstone
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Blue Sapphire
Corundum (Al2O3)
gemstone
White Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Feldspar
Aluminosilicate (KAlSi3O8 - NaAlSi3O8 - CaAl2Si2O8)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Crystal
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
White Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Sand / Sandstone grains
Silicon Dioxide (SiO2)
sedimentary
Green Aventurine
Quartz with Fuchsite inclusions (SiO2)
mineral
Quartz with Mica
Silicon Dioxide (SiO2) with Mica group inclusions
mineral
Milky Quartz Pebble
Silicon Dioxide (SiO2)
mineral