Gneiss
Gneiss (Metamorphic high-grade)
Category
Browse metamorphic rock (for both nephrite and jadeite) specimens identified by the Rock Identifier community.
Gneiss
Gneiss (Metamorphic high-grade)
Specular Hematite (Specularite)
Iron(III) oxide (Fe2O3)
Moonstone
Orthoclase Feldspar (containing Albite lamellae), (KAlSi3O8)
Ruby (Corundum)
Corundum (Aluminum Oxide) with chromium trace elements, Al2O3
Rough Emerald (Beryl)
Emerald (Be3Al2(SiO3)6 with Cr/V impurities)
Fuchsite
K(Al,Cr)2(AlSi3O10)(OH)2 (Chromium-rich Muscovite)
Kyanite (Green and Blue varieties)
Kyanite (Al2SiO5)
Graphite
Graphite (Native Carbon, C)
Green Aventurine
Quartzite with Fuchsite inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)
Rhodonite Tumbled Chips
Manganese silicate (Mn,Fe,Mg,Ca)SiO3
Kyanite (in Schist Matrix)
Kyanite (Al2SiO5)
Rhodonite
Rhodonite (Manganese Silicate), (Mn,Fe,Mg,Ca)SiO3
Greenstone (Epidote/Chlorite Schist)
Metabasalt (composed primarily of Epidote Ca2Al2(Fe3+;Al)(SiO4)(Si2O7)O(OH) and Chlorite (Mg,Fe)3(Si,Al)4O10(OH)2·(Mg,Fe)3(OH)6)
Almandine Garnet in Matrix
Almandine, Fe3Al2(SiO4)3
Rhodonite
Rhodonite (Mn,Fe,Mg,Ca)SiO3
Corundum (Ruby variety)
Aluminium oxide (Al2O3)
Plagioclase Feldspar (specifically Albite/Oligoclase)
(Na,Ca)(Si,Al)4O8
Epidote (likely Unakite component or Epidosite)
Epidote (Ca2(Al2Fe)(SiO4)(Si2O7)O(OH))
Fuchsite in Quartz
K(Al,Cr)2(AlSi3O10)(OH)2 in SiO2
Talc (Soapstone variety)
Talc (Hydrated magnesium silicate) - Mg3Si4O10(OH)2
Orthoclase Feldspar
Potassium Aluminum Silicate (KAlSi3O8)
Rhodonite
Rhodonite (Manganese Silicate), (Mn,Fe,Mg,Ca)SiO3
Blue Apatite
Apatite-(CaF), Ca5(PO4)3F (Calcium Fluorophosphate)
Yellow Sapphire or Citrine
Al2O3 (Corundum) or SiO2 (Quartz)
Muscovite Mica (likely on Quartz/Feldspar)
Muscovite - KAl2(AlSi3O10)(OH)2
Garnet (Almandine variety)
Almandine Garnet (Fe3Al2(SiO4)3)
Fuchsite
Chromium-bearing Muscovite - K(Al,Cr)2(AlSi3O10)(OH)2
Green Aventurine
Quartzite with Fuchsite inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)
Sapphire
Corundum (Al2O3)
Blue Kyanite
Kyanite (Al2SiO5)
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
Milky Quartz
Silicon Dioxide (SiO2)
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
Rhodonite
Manganese Inosilicate (MnSiO3)
Bornite
Bornite (Cu5FeS4)
Kyanite (within Quartz)
Kyanite (Al2SiO5) in crystalline Quartz base (SiO2)
Emerald in Schist (Raw/Tumbled)
Beryllium Aluminum Silicate (Be3Al2Si6O18) with Chromium/Vanadium impurities in Mica Schist
Garnet (Almandine)
Almandine (Fe3Al2(SiO4)3)
Quartzite
Quartzite (primarily SiO2)
Muscovite Mica in Quartz Matrix
Muscovite (KAl2(AlSi3O10)(OH)2) in Quartz (SiO2)
Muscovite (Mica) in Quartz Matrix
Muscovite (KAl2(AlSi3O10)(OH)2) and Quartz (SiO2)
Rough Ruby
Corundum (Al2O3) with Chromium traces