Turquoise (Rough Specimens)
Hydrous phosphate of copper and aluminium - CuAl6(PO4)4(OH)8·4H2O
mineral
Category
Mineral Precipitate (Anthropogenic Context)
Browse mineral precipitate (anthropogenic context) specimens identified by the Rock Identifier community.
Learn about Mineral Precipitate (Anthropogenic Context) in the encyclopedia
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Epithermal Gold Ore (in Quartz/Rhyolite matrix)
Auriferous Quartz (Au + SiO2)
mineral
Ironstone Concretion (Moqui Marble Type)
Goethite/Hematite-cemented Sandstone Concretion
sedimentary
![Quartz with Epidote (Silicon Dioxide (SiO2) with Calcium Aluminum Iron Silicate [Ca2(Al,Fe)3(SiO4)3(OH)]) — metamorphic](https://media.rock.id/quartz-with-epidote-2117bd72-d860-4945-814c-62d291651ca1-thumbnail.jpg)
Quartz with Epidote
Silicon Dioxide (SiO2) with Calcium Aluminum Iron Silicate [Ca2(Al,Fe)3(SiO4)3(OH)]
metamorphic
Sodalite
Sodalite (Na8Al6Si6O24Cl2)
mineral
Emerald in Matrix
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
gemstone
Dendritic Quartz
Silicon Dioxide (SiO2) with Manganese Oxide inclusions
mineral
Quartz Druzy
Silicon Dioxide (SiO2)
mineral
Amazonite
K(AlSi3O8)
mineral
Amethyst
Silicon dioxide (SiO2) with iron impurities
mineral
Citrine Quartz
Silicon Dioxide (SiO2)
mineral
Citrine Quartz
Silicon Dioxide (SiO2)
mineral
Citrine Quartz
Silicon Dioxide (SiO2) with iron impurities
mineral
Druzy Quartz (on Chalcedony/Agate base)
Silicon Dioxide (SiO2)
mineral
Spessartine Garnet in Quartz/Feldspar Pegmatite
Spessartine (Mn3Al2(SiO4)3) in Quartz (SiO2) and Feldspar
Mineral in Igneous Rock
Smoky Quartz in Matrix
Silicon Dioxide (SiO2)
mineral
Amazonite
K(AlSi3O8) - Potassium Aluminum Silicate
mineral
Tiger's Eye
Pseudomorph of Quartz (SiO2) after Crocidolite
mineral
Amazonite
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Rutilated Quartz
Silicon Dioxide (SiO2) with Titanium Dioxide (TiO2) inclusions
mineral
Pink Thulite (Zoisite)
Ca2Al3(SiO4)3(OH) - Manganese-bearing Zoisite
mineral
Sunstone
Plagioclase Feldspar (containing (Ca,Na)(Al,Si)4O8 with Hematite or Copper inclusions)
mineral
Sunstone
Oligoclase (Plagioclase Feldspar) - (Ca,Na)(Al,Si)4O8 with Hematite or Copper inclusions
mineral
Emerald with Matrix (Emerald in Mica Schist)
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
Amazonite
Microcline (KAlSi3O8 with lead impurities)
mineral
Amethyst (Quartz variety)
Amethyst - SiO2 (Silicon Dioxide with Iron impurities)
mineral
Cat's Eye Chrysoberyl
Chrysoberyl (BeAl2O4)
mineral
Amazonite
Microcline (KAlSi3O8) with lead impurities
mineral
Sunstone
Oligoclase (Plagioclase Feldspar), (Na,Ca)(Si,Al)4O8
mineral
Citrine
Silicon Dioxide (SiO2)
mineral
Moonstone (Feldspar)
Orthoclase or Oligoclase (KAlSi3O8)
mineral
Amazonite
Amazonite (KAlSi3O8)
mineral
Amazonite
Microcline (variety of Feldspar), K(AlSi3O8)
mineral
Chalcopyrite in Quartz (Gossan/Iron Hat)
CuFeS2 (Chalcopyrite) with SiO2 (Quartz)
mineral
Quartz (with inclusions / Sandstone fragment)
Silicon Dioxide (SiO2)
mineral
Amethyst
Amethyst (Silicon Dioxide - SiO2 with iron impurities)
mineral
Amazonite
Potassium Feldspar (Microcline), K(AlSi3O8)
mineral
Quartz / Citrine Quartz
Silicon Dioxide (SiO2)
mineral
Amethyst
Amethyst (Silicon Dioxide, SiO2 with Iron impurities)
mineral
Amethyst
Silicon dioxide / Quartz (SiO2+Fe4+)
mineral
Prehnite
Prehnite (Ca2Al(AlSi3O10)(OH)2)
mineral
Granite Gneiss
Gneiss (derived from granitic protolith)
metamorphic