Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Category
Mineral Specimen
Browse mineral specimen specimens identified by the Rock Identifier community.
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Desert Rose (Baryte or Selenite variant)
Barium Sulfate (BaSO4) or Gypsum (CaSO4·2H2O) with Sand inclusions
mineral
Pyrite
Iron Pyrite (FeS2)
mineral
Garnet (likely Almandine)
Almandine Garnet, Fe3Al2(SiO4)3
mineral
Amethyst
SiO2 (Silicon Dioxide with Iron impurities)
mineral
Smoky Quartz
Quartz (Silicon Dioxide) - SiO2
mineral
Hematite (Botryoidal / Kidney Ore)
Iron Oxide (Fe2O3)
mineral
Quartz Druze on Matrix
Silicon Dioxide (SiO2)
mineral
Granite Pegmatite with Tourmaline and Muscovite
Pegmatite (Feldspar: KAlSi3O8, Quartz: SiO2, Schorl: NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH))
igneous
Calcite
Calcium Carbonate (CaCO3)
mineral
Aragonite (Star Cluster or Twinned variety)
Aragonite (Calcium Carbonate, CaCO3)
mineral
Sunstone
Oligoclase or Andesine (Plagioclase Feldspar) - (Ca, Na)((Al, Si)2Si2O8)
mineral
Green Tourmaline (Verdelite)
Schorl-Elbaite series (Na(Li,Al)3Al6(BO3)3Si6O18(OH)4)
mineral
Botryoidal Hematite (Kidney Ore)
Iron(III) oxide (Fe2O3)
mineral
Pink Tourmaline in Quartz Matrix
Elbaite (Na(Li,Al)3Al6(BO3)3Si6O18(OH)4) with Quartz (SiO2)
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Larimar
Blue Pectolite (NaCa2Si3O8(OH))
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Specular Hematite (Specularite)
Iron Oxide (Fe2O3)
mineral
Sunstone
Oligoclase (Plagioclase Feldspar Group) - (Ca, Na)(Al, Si)4O8
mineral
Pyrite (on Shale/Matrix)
Iron Disulfide (FeS2)
mineral
Azurite Malachite (Mixed)
Azurite-Malachite; Azurite: Cu3(CO3)2(OH)2 / Malachite: Cu2CO3(OH)2
mineral
Lepidolite
K(Li,Al)3(Al,Si,Rb,Cs)4O10(F,OH)2
mineral
Gypsum (Wallboard/Drywall)
Calcium Sulfate Dihydrate (CaSO4·2H2O)
sedimentary
Olivine (Peridot)
Magnesium Iron Silicate (Mg, Fe)2SiO4
Mineral
Labradorite
Labradorite (Ca,Na)(Al,Si)4O8
mineral
Botryoidal Chalcedony (Druzy Quartz)
Silicon Dioxide (SiO2)
mineral
Milky quartz
Quartz (silicon dioxide, SiO₂)
mineral
Quartz (Clear Quartz Point)
Silicon Dioxide (SiO2)
mineral
Milky quartz (rough quartz chunk)
Quartz, silicon dioxide (SiO₂)
mineral
Quartz Druzy / Quartz Crystal Cluster
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Vesicular quartz-rich rock, possibly weathered rhyolite or hydrothermal quartz
Likely quartz (SiO₂) with altered feldspar, iron oxides, and cavities; exact identification requires testing
igneous
Chert (Yellow Jasper / Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Silicified fossil-bearing limestone (likely chert/agate replacement)
Microcrystalline quartz (SiO₂) replacing carbonate rock; possible fossiliferous limestone
sedimentary
Selenite (gypsum)
Gypsum, CaSO₄·2H₂O; variety commonly called satin spar or selenite
mineral
Sodalite
Sodalite: Na8(Al6Si6O24)Cl2
mineral
Rhodonite
(Mn,Fe,Mg,Ca)SiO3
mineral
Heat-Treated Amethyst (Commercial Citrine)
Silicon Dioxide (SiO2) - Macro-crystalline Quartz
mineral
Black Tourmaline in Quartz Matrix
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4) with Quartz (SiO2)
mineral
Prehnite
Prehnite (Ca2Al(AlSi3O10)(OH)2)
mineral
Weathered quartz-rich rock fragment
Likely quartz-bearing feldspathic rock; exact identification requires testing
mineral