Clear quartz crystal
Quartz (silicon dioxide, SiO₂)
mineral
Category
Mineral (Man Made Glass, Not Natural)
Browse mineral (man made glass, not natural) specimens identified by the Rock Identifier community.
Learn about Mineral (Man Made Glass, Not Natural) in the encyclopedia
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Granite
Phaneritic Felsic Igneous Rock
igneous
Sunstone
Andesine-Labradorite Feldspar ((Ca,Na)(Al,Si)4O8)
mineral
Halite (Himalayan Pink Salt)
Halite - NaCl (Sodium Chloride)
Mineral (Evaporite)
Smoky Quartz on Matrix
Crystalline Silicon Dioxide (SiO2)
mineral
Desert Rose (Gypsum)
Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O
mineral
Amazonite
K(AlSi3O8) - Potassium Aluminum Silicate (color due to lead)
mineral
Sandstone
Arenite
sedimentary
Citrine Quartz (or Heat-Treated Amethyst / Smoky Quartz)
Silicon Dioxide (SiO2)
gemstone
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Chert / Flint Nodule
Microcrystalline quartz (SiO2)
sedimentary
Chert (Jasper/Agate variety)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Nodular or Massive Variety)
Cryptocrystalline Quartz (SiO2)
sedimentary
Black Onyx
Silicon Dioxide (SiO2) - variety of Chalcedony
mineral
Pyrulite (Pyrite / Chalcopyrite)
Iron Sulfide (FeS2) or Copper Iron Sulfide (CuFeS2)
mineral
Black Onyx
Silicon Dioxide (SiO2)
mineral
Flint/Chert Nodule in Limestone
Sedimentary rock containing microcrystalline quartz (SiO2) within a calcium carbonate (CaCO3) matrix
sedimentary
Diamond
C (Carbon)
mineral
Dyed Howlite (often sold as Turquenite)
Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5)
mineral
Gold (Elemental Metal)
Gold (Au)
Mineral
Chert (and Jasper/Chalcedony mixture)
Microcrystalline Quartz (SiO2)
sedimentary
Smoky Quartz
Silicon Dioxide (SiO2) with aluminum impurities and natural irradiation
mineral
Slag (Industrial By-product)
Glassy silicate or metallic smelting residue
mineral-like (anthropogenic)
Limonite Geode / Ironstone Nodule
Hydrated Iron Oxide Hydroxide (FeO(OH)·nH2O)
mineral
Chert (Nodule)
Chert (SiO2)
sedimentary
Amethyst
Amethyst (Silicon Dioxide with Iron impurities), SiO2
mineral
Pumice
Pumice (Felsic volcanic glass)
igneous
Quartz (Smoky Quartz variant)
Silicon Dioxide (SiO2)
mineral
Granite
Granite
igneous
Amber (Copal)
Organic gemstone, fossilized tree resin (often immature amber or copal)
Mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Polished carnelian agate
Chalcedony (microcrystalline quartz), SiO₂, orange iron-oxide variety
gemstone
Diamond
Natural Carbon (C)
mineral
Cubic Zirconia
Zirconium Dioxide (ZrO2)
mineral
Limonite (Yellow Ochre)
Hydrated Iron Oxide (FeO(OH)·nH2O)
mineral
Cubic Zirconia (in Jewelry)
Zirconium Dioxide (ZrO2)
mineral
Chert (specifically Zebra Chert/Flint)
Silicon Dioxide (SiO2)
sedimentary
Herkimer Diamond
Quartz (Silicon Dioxide, SiO2)
mineral
Polished orbicular jasper (likely ocean jasper)
Jasper, a microcrystalline variety of quartz (SiO₂), with iron-oxide and other mineral inclusions
mineral
Mineral Sand (Heavy Mineral Sand Concentrate)
Placer deposit concentrate containing minerals such as ilmenite, rutile, zircon, and magnetite
mineral
Pumice
Volcanic glass / Pumiceous rock
igneous