Green Aventurine
Aventurine Quartz (SiO2 with Fuchsite inclusions)
metamorphic
Category
Metamorphic Rock (Variety Of Quartz)
Browse metamorphic rock (variety of quartz) specimens identified by the Rock Identifier community.
Learn about Metamorphic Rock (Variety Of Quartz) in the encyclopedia
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Chert Nodule (Flint)
Chert (Cryptocrystalline Silica - SiO2)
sedimentary
Red Quartzite Slipper Stone
Quartzite (SiO2)
metamorphic
Quartz (possibly Citrine or Smoky Quartz variety)
Silicon Dioxide (SiO2)
mineral
Banded Gneiss with Quartz Vein
Gneiss containing SiO2 (Quartz) intrusion
metamorphic
Chert (Nodular)
Chert (SiO2 - Microcrystalline Quartz)
sedimentary
Quartzite Cobble
Quartzite (predominantly SiO2)
metamorphic
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Amethyst
SiO2 (Silicon Dioxide)
Mineral
Raw Emerald
Beryl (Be3Al2(SiO3)6) with Cr/V impurities
mineral
Dyed Agate Slice
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Smoky Quartz
Silicon Dioxide (SiO2) with aluminum impurities and natural irradiation
mineral
Gneiss (specifically Micaceous Gneiss)
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Massive Quartz with Host Rock
Silicon Dioxide (SiO2)
mineral
Banded Gneiss
Gneiss
Metamorphic
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Petrified Wood
Silicified wood (primarily Silicon Dioxide, SiO2)
metamorphic
Granite / Gneiss Complex
Felsic Plutonic Rock (Granite) or High-grade Metamorphic Rock (Gneiss)
igneous/metamorphic
Quartzite
Quartzite
Metamorphic
Chert (Jasper/Flint variety)
Microcrystalline quartz (SiO2)
sedimentary
Blue Aragonite
Aragonite (Calcium Carbonate, CaCO3)
mineral
Quartz (Iron-stained or Milky)
Silicon Dioxide (SiO2)
mineral
Greenstone / Serpentinite
Serpentinite (composed primarily of minerals from the serpentine group Mg3Si2O5(OH)4)
metamorphic
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals usually (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4)
metamorphic
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Green Quartzite (or Aventurine)
SiO2 (Silicon Dioxide) primarily, with Fuchsite inclusions (K(Al,Cr)2AlSi3O10(OH)2)
metamorphic
Serpentine
Serpentinite (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4
metamorphic
Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
River Stone (likely Quartzite or Sandstone)
Metamorphosed Quartz-rich Rock (SiO2)
metamorphic
Unakite
Unakite (Epidotized Granite)
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Chert (Common Opal/Jasper variety)
Microcrystalline Quartz (SiO2)
sedimentary
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Muscovite Mica (Golden/Yellow variety)
KAl2(AlSi3O10)(F,OH)2
mineral
Feldspar
KAlSi3O8 - NaAlSi3O8 - CaAl2Si2O8
mineral
Amethyst Geode
Silicon Dioxide (SiO2) - Amethyst variety of Quartz
mineral
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
sedimentary
Pyrite in Quartz (Drill Core)
Silicon Dioxide (SiO2) with Iron Sulfide (FeS2) inclusions
igneous/metamorphic (hydrothermal)
Black Onyx
Silicon dioxide (SiO2) - Chalcedony variety
mineral