Granite
Felsic intrusive igneous rock
Category
Browse metal (elemental mineral) specimens identified by the Rock Identifier community.
Granite
Felsic intrusive igneous rock
Opalite (Man-made Glass)
Synthetic Opalised Glass
Limonite-stained Quartz
Silicon Dioxide (SiO2) with Hydrated Iron Oxide (FeO(OH)·nH2O) coatings
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
Pink Granite
Granite (Phaneritic Quartz-Feldspar rock)
Lepidolite on Quartz
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2 (Lepidolite) / SiO2 (Quartz)
Quartz Vein / Milky Quartz
Silicon Dioxide (SiO2)
Sunstone
Plagioclase Feldspar (Na,Ca)(Al,Si)4O8
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
Costume Jewelry with Synthetic Gemstones
Synthetic Cubic Zirconia and Glass (SiO2 / ZrO2)
Gold Flakes
Native Gold (Au)
Granite
Intrusive igneous rock
Gold Ore in Quartz
Auriferous Quartz (Au + SiO2)
Opalite
Synthetic Opalite Glass / Opalized Glass
Limonite and Goethite on Gossan
FeO(OH)·nH2O
Orange Calcite with Siderite/Iron Oxide Coating
Calcium Carbonate (CaCO3)
Iron-rich sandstone (Gozan/Ironstone)
Ferruginous Sandstone (clastic sedimentary rock)
Silver (Native Silver/Alloy Specimen)
Ag (Native Silver element), specifically a 90% Ag / 10% Cu alloy
Pyrite-rich Ore
Pyrite (FeS2) with secondary minerals
Copper Ore (with Malachite/Chrysocolla and Iron Oxides)
Secondary Copper Minerals (Cu2(CO3)(OH)2 / (Cu,Al)2H2Si2O5(OH)4·nH2O)
Limonite (Gossan)
FeO(OH)·nH2O (Hydrated Iron Oxide)
Pink Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
Gossan (Iron Hat) with Quartz and Chlorite
Limonite/Goethite-rich Gossan (FeO(OH)·nH2O) with inclusions of Quartz and Chlorite
Green Slag Glass
Amorphous Silica Glass (Anthropogenic)
Amethyst and clear gemstone ring
Amethyst (purple quartz, SiO₂), likely set with colorless quartz or glass accents
Slag
Metallurgical Slag
Quartz (Clear or Milky)
Silicon Dioxide (SiO2)
Granite
Phaneritic plutonic igneous rock (mainly Quartz, Feldspar, and Mica)
Granite
Granite (Felsic intrusive igneous rock)
Peridot (Olivine)
Magnesium Iron Silicate (Mg, Fe)2SiO4
Native Copper
Native Copper (Cu)
Granite
Intrusive igneous rock
Opalite
Synthetic Glass (SiO2 + impurities)
Blue Calcite
Calcite (Calcium Carbonate, CaCO3)
Iron Gossan (Limonite/Goethite)
Hydrated Iron Oxides (FeO(OH)·nH2O) from oxidation zones
Green Aura Quartz
Silicon Dioxide (SiO2) with Titanium/Metal Vapor Coating
Granite
Felsic intrusive igneous rock
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
Gold Nugget
Native Gold (Au)
Gold Flakes
Native Gold (Au)
Gold Flake
Native Gold (Au)
Copper Nugget
Native Copper (Cu)