Yellow Quartz (Citrine Quartz)
Silicon Dioxide (SiO2)
mineral
Category
Igneous, Sedimentary, Metamorphic
Browse igneous, sedimentary, metamorphic specimens identified by the Rock Identifier community.
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Citrine
Silicon Dioxide (SiO2)
mineral
Green Aventurine
Aventurine Quartz (SiO2 with Fuchsite inclusions)
mineral
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Smoky Quartz
Silicon dioxide with aluminum impurities (SiO2)
mineral
Yellow Quartz (Citrine Quartz or Yellow Chalcedony)
Silicon Dioxide (SiO2)
mineral
Quartz with impurities or Host Rock
SiO2 (Silicon Dioxide) with mixed silicates
mineral
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2)
mineral
Potassium Feldspar
K-Feldspar (KAlSi3O8)
mineral
Rough Corundum (Sapphire/Ruby mixture)
Corundum (Aluminum Oxide, Al2O3)
mineral
Labradorite
Labradorite ((Ca, Na)(Al, Si)4O8)
mineral
Blue Sapphire (Synthetic or Man-made Glass Imitation)
Corundum (Al2O3) if natural; Lead-glass or Spinal if synthetic
mineral
Peacock Ore
Bornite (Cu5FeS4)
mineral
Quartz Cobble (River Rock)
Silicon Dioxide (SiO2)
mineral
Amethyst
SiO2 (Silicon Dioxide with Iron impurities)
mineral
Almandine Garnet
Almandine (Fe3Al2(SiO4)3)
mineral
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
mineral
Strawberry Quartz (or Hematoid Quartz)
Silicon Dioxide (SiO2) with inclusions of Hematite or Goethite
mineral
Quartz (Vein Quartz)
Silicon Dioxide (SiO2)
mineral
Feldspar (Orthoclase)
Potassium Feldspar (KAlSi3O8)
mineral
Plagioclase Feldspar
Plagioclase Feldspar Series (NaAlSi3O8 - CaAl2Si2O8)
Mineral
Red Garnet (Almandine-Pyrope series)
Garnet Group, Almandine (Fe3Al2(SiO4)3) or Pyrope (Mg3Al2(SiO4)3)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Mica (Muscovite)
Potassium aluminum silicate - KAl2(AlSi3O10)(OH)2
mineral
Iolite (Cordierite)
Magnesium Iron Aluminum Silicate (Mg,Fe)2Al4Si5O18
mineral
Red Garnet
Almandine (Fe3Al2(SiO4)3) or Pyrope (Mg3Al2(SiO4)3)
mineral
River-worn Quartzite / Soapstone
Metamorphic Rock (Quartzite/Talc-schist)
metamorphic
Greenstone / Greenschist
Greenschist (composed of Chlorite, Epidote, Actinolite)
metamorphic
Greenstone (Altered Mafic Rock)
Greenschist / Meta-basalt
metamorphic
Dragon Blood Jasper (Lizard Stone/Septarian Chalcedony)
Epidote with Black Hornblende and White Quartz mixture
metamorphic
Unakite (bottom) and Sodalite (top)
Epidotized Granite (Unakite) and Sodium Aluminum Silicate Chloride (Sodalite)
metamorphic
Greenschist
Chlorite schist
metamorphic
Greenstone (Epidosite or Altered Basalt)
Epidosite (Ca2(Al, Fe)3(SiO4)3(OH))
metamorphic
Greenstone
Metabasalt
metamorphic
Lapis Lazuli
Lapis lazuli (Mainly Lazurite: Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)
metamorphic
Serpentinite with Quartz/Calcite Veining
Serpentinite (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4
metamorphic
Nephrite Jade
Ca2(Mg, Fe)5Si8O22(OH)2
metamorphic
Greenschist
Chlorite schist
metamorphic
Greenstone
Metabasalt (Greenstone Facies)
metamorphic
River Quartzite Siltstone
Quartz-rich Meta-siltstone (SiO2 dominated)
metamorphic