Bismuth crystal
Bismuth (Bi), artificially crystallized
mineral
Category
Mineral (Metal)
Browse mineral (metal) specimens identified by the Rock Identifier community.
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Buffalo Nickel (Indian Head Nickel)
Cupronickel (75% Copper, 25% Nickel)
mineral (processed alloy)
Slag (Industrial Glass Slag)
Amorphous Silicate Glass (often containing Al, Ca, Mg, and Ti oxides)
Mineraloid (Industrial byproduct)
Gold
Native Gold (Au)
mineral
Michigan Float Copper
Native Copper (Cu)
mineral
Green Agate
Cryptocrystalline Quartz (SiO2)
mineral
Granodiorite
Granodiorite (containing Quartz, Plagioclase Feldspar, Biotite, and Hornblende)
igneous
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Gold Nugget Jewelry
Native Gold (Au)
mineral
Gold Flake
Native Gold (Au)
mineral
Aura Turquoise or Treated Turquoise Beads
Hydrated copper and aluminum phosphate (CuAl6(PO4)4(OH)8·4H2O) with metallic coating
gemstone
Opalite
Synthetic Opalite (Man-made glass)
mineral
Aura Quartz (Pink/Rose Aura Quartz)
Silicon Dioxide (SiO2) bonded with Platinum and/or Silver
mineral
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
Diamond (Faceted)
Carbon (C)
gemstone
Yellow Quartzite (River Pebble)
Metamorphic Quartzite (SiO2)
metamorphic
Gold-bearing Quartz Vein in Mafic Rock
Hydrothermal Quartz Vein within Greenschist/Amphibolite facies (SiO2 with Au)
metamorphic
Porphyritic Basalt or Porphyritic Andesite
Porphyritic volcanic rock
igneous
Ironstone (Limonitic/Hematitic Sandstone)
Ferruginous sandstone (predominantly Fe2O3 and FeO(OH))
sedimentary
Green calcite (likely)
Calcite — calcium carbonate, CaCO₃
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Sphalerite
Zinc Sulfide (ZnS)
mineral
Gneiss (Banded Gneiss)
Gneiss
metamorphic
South Korean 100 Won Coin (Cupronickel)
Cupronickel Alloy (75% Cu, 25% Ni)
mineral-based alloy (anthropogenic)
Copper-bearing Quartz (likely Malachite on Quartz matrix)
Cu2CO3(OH)2 (Malachite) on SiO2 (Quartz)
mineral
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
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
Pyrite
Iron Disulfide (FeS2)
mineral
Granite
Felsic Intrusive Igneous Rock
igneous
Granite
Felsic intrusive igneous rock
igneous
Dyed Blue Agate Druzy Pendant
Quartz / Chalcedony (SiO2) with artificial color treatment
gemstone
Diamond (set in a eternity ring band)
Carbon (C)
gemstone
Celestite (Celestine)
Strontium Sulfate (SrSO4)
mineral
Celestite (Celestine)
Strontium Sulfate (SrSO4)
mineral
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Not a geological specimen
N/A (man-made object)
N/A
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) in Altered Host Rock
mineral
Olivine (Peridot)
Magnesium Iron Silicate (Mg, Fe)2SiO4
mineral
Pegmatite with Lepidolite and Feldspar
Pegmatite (containing K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2 and KAlSi3O8)
igneous