Tumbled amethyst
Amethyst, purple variety of quartz (SiO₂)
gemstone
Category
Mineral, Jewelry
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Tumbled amethyst
Quartz (SiO₂), purple variety known as amethyst
mineral
Tektite
Tektite (Meteorite impact glass)
meteorite
Nugget of Native Silver
Native Silver (Ag)
mineral
Sunstone (Feldspar)
(Ca,Na)((Al,Si)2Si2O8) with inclusions of Hematite or Goethite
mineral
Emerald in Matrix
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
gemstone
Druzy Quartz on Matrix
Silicon Dioxide (SiO2)
mineral
Amazonite
Microcline (K(AlSi3O8))
mineral
Quartz (Citrine/Milky variety)
Silicon Dioxide (SiO2)
mineral
Peach Moonstone
Potassium Aluminum Silicate (KAlSi3O8) with inclusions
mineral
Epidote with Quartz Vein
Epidote-bearing metamorphic rock with quartz (Ca2(Al,Fe)3(SiO4)3(OH))
metamorphic
Tiger's Eye
Quartz pseudomorph after crocidolite (SiO2)
gemstone
Yellow Quartz
Silicon Dioxide (SiO2)
mineral
Aquamarine
Beryl (Be3Al2(SiO3)6)
gemstone
Amethyst
Quartz (SiO2)
gemstone
Sunstone
Plagioclase Feldspar (Na,Ca)(Si,Al)3O8
mineral
Titanium Quartz (Aura Quartz)
Silicon Dioxide (SiO2) treated with Titanium
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Amethyst Quartz Crystal
Silicon Dioxide (SiO2) with iron impurities
mineral
Emerald
Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)
gemstone
Amethyst
Quartz (Silicon Dioxide with Iron impurities), SiO2
gemstone
Aquamarine
Be3Al2(Si6O18)
gemstone
Ametrine
Quartz (Silicon Dioxide, SiO2)
gemstone
Quartz (Agate/Jasper pebble)
Silicon dioxide (SiO2)
mineral
Amethyst
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz (Yellow / Citrine Pebble)
Silicon Dioxide (SiO2)
mineral
Yellow Quartz
Silicon Dioxide (SiO2)
mineral
Tumbled Black Tourmaline
Schorl (NaFe2+3Al6(Si6O18)(BO3)3(OH)4)
mineral
Agate Geode
Silicon Dioxide (SiO2) - Chalcedony variety
sedimentary
Brown Chalcedony
Silicon Dioxide (SiO2)
mineral
Amazonite
Microcline Feldspar (KAlSi3O8)
mineral
Quartz with Tourmaline inclusion (Tourmalinated Quartz)
Silicon Dioxide (SiO2) with Tourmaline inclusions
mineral
Agate (Sliced and Carved)
Silicon Dioxide (SiO2) - Banded Chalcedony
mineral
Agate Nodules
Cryptocrystalline Quartz (SiO2)
mineral
Rough Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Tektite
Tektite (meteoritic glass)
meteorite
Agate (specifically crazy lace agate / orbicular agate node)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
mineral
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Peridot in Matrix
Olivine ((Mg,Fe)2SiO4)
mineral
Quartz (Rose Quartz or Chert variant)
Silicon Dioxide (SiO2)
mineral
Tumbled Rose Quartz
Quartz (Silicon Dioxide, SiO2 with trace amounts of titanium, iron, or manganese)
mineral
Jasper
Microcrystalline Quartz (SiO2)
gemstone