Quartz Vein in Host Rock (Gabbro or Basalt)
Silicon Dioxide (SiO2) with Mafic Silicates
metamorphic/igneous
Category
Mineral (Processed Metal)
Browse mineral (processed metal) specimens identified by the Rock Identifier community.
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Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2 (Lithium-bearing Phyllosilicate)
mineral
Mixed Tumbled Gemstones (Agate, Aventurine, Pyrite, etc.)
Multiple (principally Silicon Dioxide SiO2 and Iron Disulfide FeS2)
mineral
Quartz Vein in Sedimentary Matrix
Silicon Dioxide (SiO2) with host rock
mineral
Aura Quartz (Pink/Magenta Aura Quartz)
Silicon Dioxide (SiO2) treated with vapor-deposited precious metals
mineral
Opalite
Synthetic glass / Opalized glass
gemstone
Opalite crescent pendant
Opalite (man-made opalescent glass; not a natural mineral)
gemstone
Aqua Aura Quartz
Titanium/Gold-coated Silicon Dioxide (SiO2)
mineral
Slag Glass (Cullet Glass)
Amorphous Silica (Industrial byproduct)
mineral
Standing Liberty Quarter (Silver Specimen)
Native Silver alloy (Ag with Cu traces)
mineral
Ferruginous Sandstone (ironstone)
Sandstone with iron oxide cement (limonite/hematite)
sedimentary
Ferruginous Sandstone (Gozzan)
Iron-rich clastic sedimentary rock with Limonite/Goethite
sedimentary
Quartz Vein / Milky Quartz
Silicon Dioxide (SiO2)
mineral
Cubic Zirconia (Diamond Simulant)
Zirconium Dioxide (ZrO2)
mineral
Slag Glass
Vitreous Silicate Residue
industrial byproduct (anthropogenic rock)
Copper Ore (Malachite and Azurite stained rock)
Copper-bearing rock with secondary copper carbonates
mineral
Silver (Native Silver/Alloy Specimen)
Ag (Native Silver element), specifically a 90% Ag / 10% Cu alloy
mineral
Likely small metallic meteorite fragments
Unclassified iron or stony-iron meteorite; mineralogy cannot be confirmed from the image
meteorite
Gold
Native Gold (Au)
mineral
Native Copper
Native Copper (Cu)
mineral
Native Silver Nugget
Silver (Ag)
mineral
Bauxite
Bauxite (mixture of Gibbiste Al(OH)3, Boehmite ̳-AlO(OH), and Diaspore ́-AlO(OH))
sedimentary
Quartz (River Pebble)
Silicon Dioxide (SiO2)
mineral
Opalite
Synthetic Silicon Dioxide (SiO2)
mineral
Gossan (Iron Hat) with Quartz and Chlorite
Limonite/Goethite-rich Gossan (FeO(OH)·nH2O) with inclusions of Quartz and Chlorite
Mineral/Metamorphic Substrate
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals, Mg3Si2O5(OH)4)
metamorphic
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
metamorphic
Dyed Fuchsia Tiger’s Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Pallasite Meteorite
Pallasite (ST-class)
mineral
Aura Quartz
Titanium-coated Silicon Dioxide (SiO2)
mineral
Serpentinite
Serpentinite (composed primarily of Serpentine minerals: Mg3Si2O5(OH)4)
metamorphic
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) within Metasedimentary or Igneous Matrix
metamorphic
Dyed Agate
Silicon Dioxide (SiO2) - Chalcedony variety
sedimentary
Gold
Gold (Au)
mineral
Serpentinite
Serpentinite (complex silicate mineral group (Mg,Fe)3Si2O5(OH)4)
metamorphic
Gold-bearing Quartz
Auriferous Quartz (SiO2 with Native Gold inclusion)
mineral
Quartz pebble in concrete
Quartz (SiO₂), embedded in Portland-cement concrete
mineral
Black Obsidian
Extrusive Volcanic Glass (primarily SiO2)
igneous
Opalite
Man-made Synthetic Glass (Silicon Dioxide with metal additives)
mineral
Dyed Blue Agate (Dragon Vein Agate)
Silicon Dioxide (SiO2) with artificial cobalt/organic dyes
mineral
Green Aura Quartz
Silicon Dioxide (SiO2) bonded with metallic vapors (typically Gold, Chromium, or Titanium)
mineral
Gold Nugget
Native Gold (Au)
mineral