Gold
Native Gold (Au)
mineral
Category
Mineral (Processed Metal)
Browse mineral (processed metal) specimens identified by the Rock Identifier community.
Learn about Mineral (Processed Metal) in the encyclopedia
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Diamond (in a metal ring setting)
Diamond (Pure Carbon, C)
mineral
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals: (Mg,Fe)3Si2O5(OH)4)
metamorphic
Bismuth Crystal
Bismuth (Bi)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Gold Ore in Quartz
Native Gold (Au) in Quartz (SiO2)
mineral
Slag (Industrial Glassy Byproduct)
Anthropogenic silicate byproduct (Slag)
Mineral-like byproduct (often mistaken for igneous rock or meteorite)
Gossan (with secondary copper minerals)
Iron-rich oxidized rock cap (Limonite/Goethite with Malachite/Chrysocolla inclusions)
metamorphic
Green Sea Glass
Amorphous Silica (man-made glass), SiO2 + additive metal oxides
mineraloid / anthropogenic (man-made origin)
Gold-bearing quartz vein specimen
Native gold (Au) in quartz (SiO₂), likely with iron-oxide staining
mineral
Quartzite
Quartzite (primarily composed of SiO O₂)
Sedimentary Rock
Black Onyx
Cryptocrystalline Quartz (SiO2) with impurities
mineral
Blue Sapphire
Corundum (Al2O3 with trace amounts of iron and titanium)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Amethyst
SiO2 (Silicon Dioxide with Iron impurities)
mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Quartzite
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Dyed Blue Agate (Slab)
Agate (Variety of Chalcedony/Microcrystalline Quartz), SiO2
mineral
Slag (Industrial Glass Slag)
Amorphous Silica / Ferro-silicate Slag
mineraloid / anthropogenic
Biotite Gneiss
Gneiss (complex mixture including Biotite K(Mg,Fe)3AlSi3O10(F,OH)2 and Quartz/Feldspar)
metamorphic
Mica Schist (with Muscovite mica)
Mica Schist (KAl2(AlSi3O10)(OH)2)
metamorphic
Ironstone Matrix with Jasper / Chert
Ferruginous Chert / Limonitic Jasper (SiO2 with Fe-oxides)
sedimentary
Goldstone
Not a natural mineral or rock. It is an ornamental glass.
Manufactured Glass (Simulant)
Granite
Phaneritic Igneous Rock (Granite)
igneous
Pyrite
Iron Disulfide (FeS2)
mineral
Likely iron-rich chert or jasper
Microcrystalline quartz (SiO₂), variably stained by iron oxides/hydroxides
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Olivine (Peridot)
Magnesium Iron Silicate ((Mg, Fe)2SiO4)
Mineral
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2 (Lithium-bearing Mica)
mineral
Quartzite with vugs/druzy quartz
Crystalline Silicon Dioxide (SiO2)
metamorphic
Mica Schist
Mica Schist (primarily Muscovite or Biotite sheet silicates)
metamorphic
Hematitic Sandstone
Sandstone with Iron Oxide (Hematite) staining
sedimentary
Celestite (Celestine)
Strontium sulfate (SrSO4)
mineral
Serpentinite
Serpentinite (composed primarily of Serpentine minerals: Mg3Si2O5(OH)4)
metamorphic
Diamond (in a jewelry setting)
Carbon (C)
mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Carbonaceous Chondrite (CV3 type)
Carbonaceous Chondrite (CV3 group)
meteorite
Pink Opal
Hydrated Silica (SiO2·nH2O) with Palygorskite/Sepiolite inclusions
gemstone
Pyrite
Iron Sulfide (FeS2)
mineral
Iron Slag
Anthropogenic Iron oxide/Silicate composite
Mineral-like byproduct (Technogenic)
Basalt with Large Augite Phenocrysts
Porphyritic Basalt (containing Ca(Mg,Fe,Al)(Al,Si)2O6)
igneous