Gold Nugget
Native Gold (Au)
Category
Browse mineral (processed metal) specimens identified by the Rock Identifier community.
Gold Nugget
Native Gold (Au)
Gold Nugget
Native Gold (Au)
Gold Nugget
Native Gold (Au)
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
Dyed Agate Slice
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
Aventurine (Green)
Silicon Dioxide (Quartz variety) containing Fuchsite - SiO2 + K(Al,Cr)2AlSi3O10(OH)2
Purple Lepidolite with Quartz
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
Likely iron-rich rock or metallic mineral fragment
Uncertain; possibly limonite/goethite-rich material or weathered iron meteorite fragment
Milky Quartz
Silicon Dioxide (SiO2)
Gold
Native Gold (Au)
Milky Quartz
Silicon Dioxide (SiO2)
Gold Nugget
Native Gold (Au)
Sandstone
Arenite (primarily SiO2)
Milky Quartz (Vein Quartz)
Silicon Dioxide (SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Limonite and Hematite Gossan
Hydrated Iron Oxide Mix (FeO(OH)·nH2O) / Ferric oxide (Fe2O3)
White Zircon
Zircon (Zirconium silicate, ZrSiO4)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Granite
Intrusive Igneous Rock (composed primarily of quartz, alkali feldspar, and plagioclase)
Beryl (likely Aquamarine) in matrix
Be3Al2(SiO3)6 (Beryllium Aluminum Silicate)
Goldstone (aventurine glass)
Man-made copper-bearing glass; not a natural mineral (commonly sold as blue/brown goldstone)
Opalite (Synthetic Opalized Glass)
Synthetic Silicon Dioxide (SiO2) glass
Aquamarine
Beryllium aluminum silicate (Be3Al2Si6O18)
Stainless Steel (Polished)
Ferrous Alloy containing Iron (Fe), Chromium (Cr), and Carbon (C)
Sandstone
Arenite (Siliclastic sedimentary rock), SiO2 + various minerals
Limonite with Quartz
FeO(OH)·nH2O (Limonite) with SiO2 (Quartz)
Pyrite (on host rock/ore)
Iron Sulfide (FeS2)
Slag
Anthropogenic glassy silicate
Pyrite (Cube variety)
Iron Sulfide (FeS2)
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
Native Copper with Malachite and Chrysocolla
Native Copper (Cu) with Malachite [Cu2CO3(OH)2] and Chrysocolla [(Cu,Al)2H2Si2O5(OH)4·nH2O]
Pyrite
Iron Sulfide (FeS2)
Brown Jasper (Likely)
Jasper (Cryptocrystalline Silicon Dioxide - SiO2)
Slag
Anthropogenic Iron Silicate Glass
Opalite
Synthetic Glass (typically Silica/Magnesium based with metal additives)
Pyrite
Iron Sulfide (FeS2)
Pyrite (on a metal substrate)
Iron Sulfide (FeS2)
Vesicular basalt (possible scoria)
Basaltic volcanic rock; chiefly plagioclase, pyroxene, and iron-rich minerals, with vesicles formed by trapped gas
Limonite (Ironstone)
Hydrated Iron(III) Oxide-hydroxide (FeO(OH)·nH2O)
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
Slag Glass (Cullet)
Amorphous Silicon Dioxide (SiO2) with metal oxide colorants
Dalmatian Stone
Dalmatian Jasper (Peralkaline Quartz-Feldspar Rock)