Gold in Quartz
Hydrothermal Quartz with Native Gold (SiO2 with Au)
mineral
Category
Mineral (Processed Metal)
Browse mineral (processed metal) specimens identified by the Rock Identifier community.
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Amethyst bead bracelet
Amethyst, purple quartz (SiO₂)
gemstone
Dyed red crystal aggregate, likely quartz or salt
Uncertain; possibly dyed quartz (SiO₂) or halite (NaCl)
mineral
Quartz-rich rock fragment (tentative)
Quartz, silicon dioxide (SiO₂), possibly in a weathered host rock
mineral
Tumbled pink feldspar (likely moonstone or orthoclase)
Potassium feldspar, chiefly orthoclase (KAlSi₃O₈); possibly adularescent moonstone
mineral
Native copper nugget
Copper (Cu), commonly with cuprite and copper-oxide alteration
mineral
Man-made Ceramic / Clay Figurine
Aluminosilicate Ceramic (Processed Clay)
Synthetic (not a rock or mineral)
Yellow Quartzite (River Pebble)
Metamorphic Quartzite (SiO2)
metamorphic
Gold (Elemental Metal)
Gold (Au)
Mineral
Quartz Vein in Host Rock
Silicon dioxide (SiO2) veins in metamorphic/igneous host rock
igneous
Unidentified dark, flat specimen
Indeterminate; image resolution is insufficient for mineral identification
mineral
Polished orbicular jasper (likely ocean jasper)
Jasper, a microcrystalline variety of quartz (SiO₂), with iron-oxide and other mineral inclusions
gemstone
Synthetic Blue Aura Quartz
Silicon Dioxide (SiO2) with Metallic Infusion
mineral (synthetic/man-made coating)
Titanium Aura Quartz (Bismuth-coated Druzy)
Silicon Dioxide (SiO2) with Titanium/Metal vapor coating
mineral
Tumbled brown jasper (likely brecciated or scenic jasper)
Microcrystalline quartz/chalcedony, SiO₂, with iron-oxide inclusions
mineral
Gold
Native Gold (Au)
mineral
Aluminum Slag
Anthropogenic Aluminum (Al)
mineral
Dyed Agate
Silicon dioxide, SiO2
Mineral (Chalcedony)
Opalite (Man-made Glass)
Fused glass (typically made of dolomite and metal opacifiers)
Man-made Material / Glass
Cubic Zirconia
Zirconium Dioxide (ZrO2)
mineral
Petrified Coral (Agatized Coral)
Fossilized Anthozoa (Silicon Dioxide replacement - SiO2)
fossil
Serpentinite
Serpentinite (complex silicate of magnesium, (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4)
metamorphic
Silver
Ag (Native Silver)
mineral
Unidentified gray metallic object
Not determinable from the image; likely a metal screw or manufactured fastener rather than geological material
mineral
Blue Goldstone
Man-made glass with suspended copper, cobalt, or manganese particles
man-made glass
Bismuth Crystal
Bismuth (Bi)
mineral
Slag (Industrial Byproduct)
Ferro-silicate glass (Slag)
Anthropogenic (Man-made industrial deposit)
Cobalt Blue Slag Glass
Amorphous Silicon Dioxide (anthropogenic) with Cobalt additives
mineraloid
Satin Spar (Satin Spar Gypsum)
Calcium Sulfate Dihydrate (CaSO4·2H2O)
mineral
Heat-Treated Amethyst (Commercial Citrine)
Silicon Dioxide (SiO2) - Macro-crystalline Quartz
mineral
Bismuth
Native Bismuth (Bi)
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Opalite (likely man-made glass)
Opalite; amorphous silica glass, not a natural mineral
gemstone
Dyed Agate
Silicon Dioxide (SiO2) with artificial pigment
mineral
Blue Onyx (Dyed Agate/Chalky Chalcedony)
Silicon Dioxide (SiO2) with artificial pigment
mineral
Galena in Quartz Matrix
Lead Sulfide (PbS) in Silicon Dioxide (SiO2)
mineral
Quartz Vein in Host Rock
Silicon Dioxide (SiO2)
mineral
Slag (Industrial By-product)
Glassy silicate or metallic smelting residue
mineral-like (anthropogenic)
Porphyritic Basalt or Porphyritic Andesite
Porphyritic volcanic rock
igneous
Yellow Beryl
Beryl (Be3Al2(SiO3)6)
mineral
Likely tumbled pale-green mineral specimen
Indeterminate; possibly serpentine, calcite, or pale jade/nephrite
mineral
Native Silver
Silver (Ag)
mineral