Milky Quartz
Silicon Dioxide (SiO2)
Category
Browse mineral (synthetic paper and ink polymorph) specimens identified by the Rock Identifier community.
Milky Quartz
Silicon Dioxide (SiO2)
Carnelian Agate
Silicon Dioxide (SiO2) with high Iron Oxide impurities
Quartz Geode
Silicon Dioxide (SiO2)
Agate with Quartz Druzy
Silicon Dioxide (SiO2) - Microcrystalline and Macrocrystalline varieties
Tiffany Stone
Fluorite Opal (a complex mix of Fluorite, Opal, Calcite, Dolomite, Quartz, and Bertrandite)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Amethyst
Silicon Dioxide (SiO2) with iron impurities
Smoky Quartz (with possible Garnet inclusions)
Silicon Dioxide (SiO2)
Amethyst (Tumbled)
Purple Quartz (SiO2 with iron impurities and irradiation)
Carnelian (Carnelian Agate)
Carnelian (Silicon Dioxide - SiO2)
Specular Hematite (Specularite)
Iron Oxide (Fe2O3)
Amazonite
Microcline (KAlSi3O8)
Tanzanite
Blue Zoisite (Ca2Al3(SiO4)(Si2O7)O(OH))
Agate Geode
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Sagenitic Agate (with Goethite/Rutile inclusions)
Silicon Dioxide (SiO2) with hydrous ferric oxide inclusions
Quartz Pebble
Silicon Dioxide (SiO2)
Agate (Water-Worn Pebble)
Silicon Dioxide (SiO2) - Chalcedony
Citrine
Silicon dioxide (SiO2) - yellow quartz variety
Quartz (Smoky/Milky variant)
Silicon Dioxide (SiO2)
Carnelian
Carnelian (Silicon Dioxide - SiO2)
Yellow Quartz (Chalcedony)
Quartz / Chalcedony (Silicon Dioxide, SiO2)
Milky and Ferruginous Quartz
Silicon Dioxide (SiO2)
Moss Agate
Chalcedony (Silicon Dioxide) with dendritic inclusions (SiO2)
Amethyst
Amethyst (Silica mineral, SiO2)
Hematite (Iron Ore)
Hematite (Fe2O3)
Turquoise
CuAl6(PO4)4(OH)8·4H2O
Green Aventurine
Quartz (Silicon Dioxide) with Fuchsite inclusions (K(Al,Cr)2(AlSi3O10)(OH)2)
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
Carnelian Agate
Silicon Dioxide (SiO2) - Variety of Chalcedony
Peach Aventurine
Quartz variety (SiO2 + Hematite/Goethite inclusions)
Malachite
Malachite (Copper Carbonate Hydroxide, Cu2CO3(OH)2)
Limonite-pseudomorph after Pyrite (Prophecy Stone)
Goethite and Limonite secondary minerals (FeO(OH)·nH2O) replacing Pyrite (FeS2)
Citrine
Silicon Dioxide (SiO2) with iron impurities
Agate
Chalcedony (SiO2)
Diamond (in jewelry setting)
Diamond (Native Carbon, C)
Amethyst
Amethyst (Silicon Dioxide with Iron impurities, SiO2)
Flower Agate (Cherry Blossom Agate)
Chalcedony (SiO2) with Opaque Inclusions
Rose Quartz
Quartz (Silicon Dioxide - SiO2) with trace amounts of titanium, iron, or manganese
White Topaz
Topaz - Al2SiO4(F,OH)2
Quartz Pebble (likely Chalcedony or Quartzite)
Silicon Dioxide (SiO2)
Diamond (Set in jewelry)
Cubic Carbon (C)
Amethyst
Amethyst (Silicon Dioxide - SiO2 with impurities of iron)