Green Slag Glass
Amorphous Silica Glass (Anthropogenic)
Industrial byproduct (often mistaken for obsidian or mineral)
Category
Mineral (Refined Metal)
Browse mineral (refined metal) specimens identified by the Rock Identifier community.
Learn about Mineral (Refined Metal) in the encyclopedia
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Limonite (Gossan)
FeO(OH)·nH2O (Hydrated Iron Oxide)
mineral
Multicolor quartz bead bracelet
Quartz (silicon dioxide, SiO₂); bead colors may be from different varieties or treated quartz
gemstone
Quartz (Clear or Milky)
Silicon Dioxide (SiO2)
mineral
Green aventurine beads
Aventurine quartz, SiO₂, colored green by fuchsite or other inclusions
mineral
Cubic Zirconia (Diamond Simulant)
Zirconium Dioxide (ZrO2)
mineral
Emerald and Diamond (Jewelry Setting)
Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities) and Carbon (C)
mineral
Lavender Quartz (appearing as beads) and Druzy Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Vein in Host Rock (Gossanous Matrtix)
Silicon Dioxide (SiO2) with iron oxides (Limonite/Hematite)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Aura Quartz
Silicon Dioxide (SiO2) treated with metal vapor
gemstone
Granite
Granite (Felsic intrusive igneous rock)
igneous
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) vein cutting through host rock
mineral
Granite
Phaneritic plutonic igneous rock (mainly Quartz, Feldspar, and Mica)
igneous
Epithermal Gold Ore (in Quartz/Rhyolite matrix)
Auriferous Quartz (Au + SiO2)
mineral
Pyrite-rich Ore
Pyrite (FeS2) with secondary minerals
mineral
Aura Quartz (Titanium/Bismuth Coated)
Silicon Dioxide (SiO2) with metallic vapor coating
mineral
Gold Nugget
Native Gold (Au)
mineral
Gossan (Iron Hat) with Quartz and Chlorite
Limonite/Goethite-rich Gossan (FeO(OH)·nH2O) with inclusions of Quartz and Chlorite
Mineral/Metamorphic Substrate
Polished smoky quartz or brown chalcedony pebble
Silicon dioxide (SiO₂), likely quartz/chalcedony with iron-oxide inclusions
mineral
Turquoise cabochon ring
Turquoise — hydrated copper aluminum phosphate, CuAl₆(PO₄)₄(OH)₈·4H₂O
gemstone
Ferrochrome Slag
Anthropogenic slag (Fe-Cr alloy waste)
industrial byproduct
Gold Nuggest
Native Gold (Au)
mineral
Gold
Native Gold (Au)
mineral
Silver (Jewelry form)
Native Silver (Ag)
mineral
Peridot (Olivine)
Magnesium Iron Silicate (Mg, Fe)2SiO4
mineral
Amethyst and clear gemstone ring
Amethyst (purple quartz, SiO₂), likely set with colorless quartz or glass accents
gemstone
Granite
Intrusive igneous rock
igneous
Amethyst ring
Amethyst, purple quartz (SiO₂)
gemstone
Copper Ore (with Malachite/Chrysocolla and Iron Oxides)
Secondary Copper Minerals (Cu2(CO3)(OH)2 / (Cu,Al)2H2Si2O5(OH)4·nH2O)
mineral
Opalite
Synthetic Glass (SiO2 + impurities)
mineral
Blue Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Slag
Metallurgical Slag
igneous
Turquoise inlay ring
Turquoise, CuAl₆(PO₄)₄(OH)₈·4H₂O
gemstone
Granite
Intrusive igneous rock composed mainly of quartz, alkali feldspar, and plagioclase
igneous
Blue-green cabochon pendant, likely turquoise or composite turquoise
Turquoise: hydrated copper aluminum phosphate, CuAl₆(PO₄)₄(OH)₈·4H₂O; exact identification is uncertain from the blurred image
gemstone
Polished native copper
Native copper (Cu), likely with cuprite/tenorite oxidation products
mineral
Granite
Felsic intrusive igneous rock
igneous
Iridescent red crystal cluster, likely aura-coated quartz
Quartz (SiO₂), possibly metal-coated; exact identification is uncertain from the photo
mineral
Pyrite in Matrix
Iron Sulfide (FeS2)
mineral