Olivine (Peridot)
Magnesium Iron Silicate ((Mg, Fe)2SiO4)
mineral
Category
Mineral (Refined Metal)
Browse mineral (refined metal) specimens identified by the Rock Identifier community.
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Quartz Vein / Milky Quartz
Silicon Dioxide (SiO2)
mineral
Metallic sulfide ore, possibly pyrite-rich
Pyrite (FeS₂), potentially mixed with chalcopyrite, galena, or iron oxides
mineral
Faceted quartz crystal sphere (likely rock crystal)
Quartz, silicon dioxide (SiO₂)
gemstone
Pink Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
mineral
Mixed gemstone bead bracelet
Likely rose quartz, amethyst, and possibly rhodonite or lepidolite beads
gemstone
Granite
Felsic intrusive igneous rock
igneous
Granite
Granite (Intrusive Igneous Rock)
igneous
Quartz–feldspar pegmatite fragment
Granitic pegmatite; chiefly quartz (SiO₂) and feldspar, with possible mica/amphibole
igneous
Diamond jewelry pendant or cluster
Diamond, crystalline carbon (C), likely mounted in metal
gemstone
Pallasite Meteorite (likely Imilac or Brenham)
Stony-Iron Meteorite (Pallasite)
mineral
Gold Nugget
Native Gold (Au)
mineral
Sphalerite in Chalcedony (Crescent Carving)
Zinc Sulfide (ZnS) with Silicon Dioxide (SiO2)
mineral
Granite
Intrusive Igneous Rock
igneous
Native Copper
Native Copper (Cu)
mineral
Copper-bearing chrysocolla/azurite host rock (probable)
Chrysocolla, Cu₂H₂Si₂O₅(OH)₄·nH₂O, with possible azurite Cu₃(CO₃)₂(OH)₂ in iron-stained quartz/matrix
mineral
Galena-rich sulfide specimen
Galena (lead sulfide, PbS), possibly with sphalerite or other sulfides
mineral
Native silver (likely)
Silver, Ag; possibly silver-bearing sulfide or mica contamination
mineral
Celestite (Celestine)
Strontium Sulfate (SrSO4)
mineral
Celestite (Celestine)
Strontium Sulfate (SrSO4)
mineral
Bauxite
Bauxite (Al2O3·2H2O)
sedimentary
Aura Quartz / Rainbow Aura Quartz
Silicon Dioxide (SiO2) with metallic vapor coating
mineral
Manganese Nodule
Polymetallic Nodule (Hydrous manganese and iron oxides)
mineral
Likely iron-rich meteorite or hematite-rich rock
Uncertain; possible iron meteorite (Fe–Ni alloy) or limonite/goethite-bearing hematite
mineral
Silver (Native or Alloyed)
Ag (Argentum)
mineral
Granite
Intrusive Igneous Rock
igneous
Granite
Granite
igneous
Not a geological specimen
N/A (man-made object)
N/A
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
mineral
Gold Nugget
Native Gold (Au)
mineral
Serpentinite
Serpentinite (Hydrated magnesium iron phyllosilicate)
metamorphic
Small faceted gemstone, likely diamond
Diamond (crystalline carbon, C)
gemstone
Ruby and Sapphire Cluster Ring
Corundum (Al2O3)
gemstone
Granite
Intrusive Igneous Rock
igneous
Sandstone (Quartzose Sandstone / Feldspathic Sandstone)
SiO2 with minor impurities (Fe2O3, KAlSi3O8)
sedimentary
Quartz Vein in Host Rock (Likely Slate or Shale)
Hydrothermal Quartz (SiO2) in Pelitic host rock
metamorphic
Natural Gold Nugget
Native Gold (Au)
mineral
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
Druzy Quartz
Silicon Dioxide (SiO2)
mineral
Limonite with Quartz (Gossan)
Hydrated iron(III) oxide-hydroxide mixture (FeO(OH)·nH2O) with Silicon Dioxide (SiO2)
Mineral