Milky Quartz with Iron Staining
Silicon Dioxide (SiO2)
mineral
Category
Mineral, Metal (Element)
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Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz crystal pendant
Quartz (silicon dioxide, SiO₂), likely rock crystal or milky quartz
mineral
Greenstone or Chlorite Schist
Greenschist / Chlorite schist
metamorphic
Aura Quartz / Rainbow Aura Quartz
Silicon Dioxide (SiO2) with metallic vapor coating
mineral
Not a geological specimen
N/A (man-made object)
N/A
Pallasite Meteorite (likely Imilac or Brenham)
Stony-Iron Meteorite (Pallasite)
mineral
Gold Nugget
Native Gold (Au)
mineral
Bauxite
Bauxite (Al2O3·2H2O)
sedimentary
Granite
Granite
igneous
Mixed gemstone jewelry collection
Various gemstone minerals, including likely amethyst (quartz), sapphire or iolite, garnet, pearl, turquoise, and colored beryl or tourmaline
gemstone
Granite
Intrusive Igneous Rock
igneous
Quartz Vein in Host Rock (Likely Slate or Shale)
Hydrothermal Quartz (SiO2) in Pelitic host rock
metamorphic
Ironstone / Gossan with Quartz Inclusions
Limonite / Goethite rich Sandstone / Gossan
sedimentary
Limonite with Quartz (Gossan)
Hydrated iron(III) oxide-hydroxide mixture (FeO(OH)·nH2O) with Silicon Dioxide (SiO2)
Mineral
Metallic iron meteorite (probable)
Iron meteorite, typically kamacite–taenite (Fe–Ni alloy)
meteorite
Granite
Intrusive Igneous Rock
igneous
Aura Quartz Geode (Angel Aura Quartz)
Silicon Dioxide (SiO2) bonded with precious metals
mineral
Aura Quartz (Pink/Magenta Aura Quartz)
Silicon Dioxide (SiO2) treated with vapor-deposited precious metals
mineral
Gossan (Iron Hat)
Iron oxide-rich weathered rock (primarily Limonite and Goethite with secondary Quartz)
mineral
Aura Quartz
Titanium or Gold bonded Silicon Dioxide (SiO2)
mineral
Petrified Wood
Silicified Wood (primarily Quartz / Chalcedony: SiO2)
metamorphic
Pyrite in Quartz
Iron Sulfide (FeS2) in Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Limonite (Iron Stone/Gossen)
Limonite (FeO(OH)·nH2O)
mineral
Natural Gold Nugget
Native Gold (Au)
mineral
Sandstone (Quartzose Sandstone / Feldspathic Sandstone)
SiO2 with minor impurities (Fe2O3, KAlSi3O8)
sedimentary
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Barite
Barium Sulfate (BaSO4)
mineral
Native Copper (in coinage alloy)
Copper (Cu)
mineral
Chert (variations include Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Quartz Vein in Schist / Gneiss
Silicon Dioxide (SiO2) in Metamorphic Matrix
igneous
Gold
Native Gold (Au)
mineral
Amber Inlay Jewelry
Fossilized Resin (C10H16O)
Organic Gemstone (Biogenic)
Quartz Vein in Siltstone
Silicon Dioxide (SiO2) within Sedimentary/Metamorphic Matrix
metamorphic
Polished labradorite pendant
Labradorite, a calcium-rich plagioclase feldspar (approximately NaAlSi₃O₈–CaAl₂Si₂O₈)
mineral
Likely hematite-rich ironstone or metallic mineral fragment
Hematite (Fe₂O₃), possibly with magnetite (Fe₃O₄) or metallic iron
mineral
Native Copper in Matrix
Native Copper (Cu)
mineral
Aura Druzy Agate (Star Shape)
Silicon Dioxide (SiO2) with Titanium/Metal Vapor Coating
mineral
Green Aventurine
Silicon Dioxide (Quartz with Fuchsite inclusions), SiO2
metamorphic
Opalite
Synthetic Glass (Hydrated Silica Simulant)
mineral
Aura Quartz Geodes (Lab-Altered)
Silicon Dioxide (SiO2) with Metallic Vapor Deposition
mineral