Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Category
Metamorphic
Browse metamorphic specimens identified by the Rock Identifier community.
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Banded Gneiss (with Quartz Vein)
Gneiss (Metamorphic rock of varying mineralogy)
metamorphic
Anthracite Coal
Anthracite (Carbon-rich metamorphic rock)
metamorphic
Gneiss
High-grade foliated metamorphic rock
metamorphic
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Gneiss
High-grade metamorphic rock (Gneiss)
metamorphic
Garnet in Matrix (likely Almandine Garnet)
Almandine (Fe3Al2(SiO4)3)
metamorphic
Fuchsite Schist
Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2) in Schist
metamorphic
Yellow Quartzite
Quartzite (primarily Silicon Dioxide - SiO2)
metamorphic
Nuummite
Nuummite (Orthoamphibole rock composed of Anthophyllite and Gedrite, (Mg,Fe)7Si8O22(OH)2)
metamorphic
Green Aventurine
Aventurine Quartz (SiO2 with inclusions of Fuchsite)
metamorphic
Jade
Jade can refer to two distinct minerals: Nephrite (a variety of the mineral actinolite, Ca2(Mg,Fe)5Si8O22(OH)2) and Jadeite (Na(Al,Fe3+)Si2O6). Based on the image, showing a relatively uniform green color and possibly slight translucence in bead form, it is very likely one of these, but determining which one from a photo is difficult without specific testing.
Mineral/Metamorphic Rock (Nephrite or Jadeite)
Black Tourmaline
Schorl (Na(Fe²⁺)₃Al₆(OH)₄(BO₃)₃Si₆O₁₈)
Mineral
Garnet Beads
Garnet Group (complex nesosilicates, e.g., Almandine Fe3Al2(SiO4)3)
Mineral
Pyrite
Iron Pyrite (FeS2)
Mineral
River Quartzite Siltstone
Quartz-rich Meta-siltstone (SiO2 dominated)
metamorphic
Green Schist
Greenschist (composed of Chlorite, Actinolite, and Epidote)
metamorphic
Citrine (Yellow Quartz)
Silicon Dioxide (SiO2)
Mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Green Aventurine
Silicon Dioxide (Quartz with Fuchsite inclusions), SiO2
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (chiefly SiO2)
metamorphic
Mica Schist (with Garnet)
Garnet-Mica Schist
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Green Quartzite (or Green Jasper)
Silica (Silicon Dioxide, SiO2) with inclusions
metamorphic
Unakite
Epidotized Granite
metamorphic
Schist (Oxidized)
Mica Schist with Iron Oxide staining
metamorphic
Green Quartzite
Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Quartzite (Ferruginous)
Metamorphosed Quartz Sandstone (SiO2 with Fe2O3 impurities)
metamorphic
Greenschist / Chloritaform Schist
Chlorite Schist (Group of Silicate Minerals)
metamorphic
Quartzite pebble
Quartzite (SiO2)
metamorphic
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
White Quartz (Milky Quartz)
Quartz (Silicon Dioxide - SiO2)
mineral
Biotite (Black Mica)
Biotite - K(Mg,Fe)3(AlSi3O10)(OH)2
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Unakite
Unakite (Epidotized Granite)
metamorphic
Epidote in Matrix (Unakite-related)
Epidosite (Ca2(Al,Fe)3(SiO4)3(OH))
metamorphic
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2)
mineral