Milky Quartz
Silicon Dioxide (SiO2)
mineral
Category
Igneous And Metamorphic
Browse igneous and metamorphic specimens identified by the Rock Identifier community.
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Likely brown mica (biotite) specimen
Biotite, a potassium-iron-magnesium sheet silicate; approximate formula K(Mg,Fe)₃AlSi₃O₁₀(F,OH)₂
mineral
Quartz (likely milky quartz)
Quartz, silicon dioxide (SiO₂)
mineral
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Yellow Quartz
Silicon Dioxide (SiO2)
mineral
Citrine Quartz
SiO2 (Silicon Dioxide with Iron impurities)
mineral
Milky quartz
Quartz (silicon dioxide, SiO₂)
mineral
Quartz pebble
Silicon dioxide (SiO2)
sedimentary
Likely white quartz or feldspar fragment
Unidentified pale mineral; quartz (SiO₂) or feldspar are possibilities
mineral
Small, pale gray-green rock fragment
Undetermined fine-grained silicate rock; exact identification is not possible from the image
igneous
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Mixed Mineral Collection
Multi-mineral Assemblage (Quartz, Jasper, Obsidian, Pyrite, etc.)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Sunstone Quartz / Aventurine Quartz
Silicon Dioxide (SiO2) with inclusions
mineral
Citrine
Silicon Dioxide (SiO2)
mineral
Amethyst
SiO2 (Silicon Dioxide with Iron impurities)
mineral
Common Opal
SiO2·nH2O (Hydrated Silicon Dioxide)
mineraloid
Quartz (Amethyst variety)
Silicon Dioxide (SiO2)
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Unidentified small white mineral fragment, possibly quartz
Unconfirmed; quartz (SiO₂) is a plausible visual match
mineral
Green apatite crystal
Apatite group; likely fluorapatite, Ca₅(PO₄)₃F
mineral
Biotite on Quartz
Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2) and Quartz (SiO2)
mineral
Orange Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
White Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Biotite Mica
Biotite (K(Mg,Fe)3AlSi3O10(OH,F)2)
mineral
Milky Quartz with Iron Inclusions
Silicon Dioxide (SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Peacock Ore
Bornite (Cu5FeS4)
mineral
Milky Quartz
Quartz (SiO2)
Mineral
Peach Moonstone
Orthoclase (Potassium Aluminum Silicate, KAlSi3O8)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Emerald
Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)
gemstone
Hematite
Hematite (Fe2O3)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Blue Zircon
Zircon (Zirconium Silicate), ZrSiO4
gemstone
Pyrite
Iron Sulfide (FeS2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Milky Quartz in Siltstone or Feldspar
Silicon Dioxide (SiO2)
mineral
Milky quartz
Quartz (silicon dioxide, SiO₂)
mineral