Granite
Intrusive Igneous Rock
igneous
Category
Mineral, Metal (Element)
Browse mineral, metal (element) specimens identified by the Rock Identifier community.
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Natural Gold Nugget
Native Gold (Au)
mineral
Garnet-set butterfly brooch
Likely almandine or pyrope garnet, iron–aluminum silicate (Fe₃Al₂Si₃O₁₂ or Mg₃Al₂Si₃O₁₂)
gemstone
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Silver (Native or Alloyed)
Ag (Argentum)
mineral
Copper Bullion Round
Native Copper (refined), Cu
mineral
Not a geological specimen
N/A (man-made object)
N/A
Sandstone (Quartzose Sandstone / Feldspathic Sandstone)
SiO2 with minor impurities (Fe2O3, KAlSi3O8)
sedimentary
Serpentinite
Serpentinite (Hydrated magnesium iron phyllosilicate)
metamorphic
Gold Flakes
Native Gold (Au)
mineral
Gold Flake
Native Gold (Au)
mineral
Copper Nugget
Native Copper (Cu)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
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
Cubic Zirconia (as used in jewelry setting)
Zirconium dioxide (ZrO2)
mineral
Greenstone or Chlorite Schist
Greenschist / Chlorite schist
metamorphic
Amber Inlay Jewelry
Fossilized Resin (C10H16O)
Organic Gemstone (Biogenic)
Quartz Vein in Schist / Gneiss
Silicon Dioxide (SiO2) in Metamorphic Matrix
igneous
Vesicular basalt (possibly industrial slag)
Basalt, chiefly plagioclase + pyroxene ± olivine; exact identification is uncertain from the image
igneous
Milky Quartz Vein in Mafic Rock
Quartzite vein in Metabasalt (SiO2 base)
metamorphic
Iron Meteorite Fragment
Siderite (Geological term for iron meteorite class - Fe/Ni alloy)
igneous
Green Aventurine
Silicon Dioxide (Quartz with Fuchsite inclusions), SiO2
metamorphic
Polished iron meteorite fragment
Iron meteorite, chiefly kamacite and taenite (Fe–Ni alloys), possibly weathered or etched
meteorite
Weathered copper-bearing rock (likely malachite-stained basalt or greenstone)
Malachite, Cu₂CO₃(OH)₂, as a secondary coating on a mafic host rock; exact identification requires testing
igneous
Limonite (Iron Stone/Gossen)
Limonite (FeO(OH)·nH2O)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Quartz Vein in Matrix
Silicon Dioxide (SiO2) within Rhyolitic or Granitic Matrix
igneous
Serpentinite
Serpentine rock (Mg,Fe,Ni,Al,Zn,Mn)3(Si,Al,Fe)2O5(OH)4
metamorphic
Cubic Zirconia (Man-made)
Cubic Zirconia (ZrO2) with Enamel and Metal Alloy
mineral
Possible iron-rich meteorite fragment
Undetermined; possible stony-iron or iron-oxide-rich meteorite
meteorite
Quartzite pebble
Quartzite (SiO2) with iron oxide staining
metamorphic
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Gold-bearing quartz (probable sulfide-bearing quartz)
Quartz, SiO₂, with possible pyrite or mica inclusions
mineral
Green Aventurine
Silicon Dioxide with Fuchsite (SiO2)
mineral
Diamond Druzy (Crystalline Diamond)
Carbon (C)
mineral
Cubic Zirconia (CZ) in Gold-Plated Setting
Cubic Zirconium Dioxide (ZrO2)
mineral
Cubic Zirconia (as a jewelry specimen)
Zirconium dioxide (ZrO2)
mineral