Red cabochon gemstone, likely carnelian or dyed chalcedony
Chalcedony (microcrystalline quartz), SiO₂; exact identification requires testing
gemstone
Category
Man Made Material (Jewelry, Metal Alloy)
Browse man made material (jewelry, metal alloy) specimens identified by the Rock Identifier community.
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Aquamarine
Beryllium aluminum silicate (Be3Al2Si6O18)
mineral
Red Cubic Zirconia (Simulated Garnet)
Zirconium Dioxide (ZrO2)
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Amethyst
SiO2 (Silicon Dioxide with iron impurities)
mineral
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
mineral
Gold Nugget
Native Gold (Au)
mineral
Diamond
Diamond (pure carbon C)
mineral
Sea Glass
Amorphous silicon dioxide (glass)
mineral
Jade (likely nephrite)
Nephrite jade: interlocking actinolite–tremolite amphibole, Ca₂(Mg,Fe)₅Si₈O₂₂(OH)₂; exact identification requires testing
metamorphic
Almandine Garnet
Iron aluminum silicate (Fe3Al2(SiO4)3)
mineral
Turquoise
Turquoise, CuAl6(PO4)4(OH)8·4H2O
mineral
Gold Nugget Jewelry
Native Gold (Au)
mineral
Blue Topaz
Aluminum Silicate Fluoride Hydroxide Al2SiO4(F,OH)2
mineral
Moonstone (specifically Rainbow Moonstone / White Labradorite)
White Labradorite (Feldspar Group: (Na,Ca)(Al,Si)4O8)
mineral
Peanut Wood
Petrified Wood (Silicified Araucaria with Teredo boreholes)
fossil
Pyrite and Quartz Agglomerate
Iron Sulfide (FeS2) with Silicon Dioxide (SiO2)
mineral
Silver (Sterling Silver Jewelry)
Argentum (Ag) mixed with Copper (Cu)
mineral
Gold
Native Gold (Au)
mineral
Moonstone
Orthoclase Feldspar (formula: (K,Na)AlSi3O8)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Clay (as a rock-forming material)
Clay minerals (e.g., Kaolinite group, Smectite group, Illite group, Chlorite group)
Mineral
Brecciated Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Slag (Industrial Glass Slag)
Amorphous Silica / Ferro-silicate Slag
mineraloid / anthropogenic
Diamond
Cubic carbon (C)
mineral
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
mineral
Aragonite
Aragonite (Calcium Carbonate - CaCO3)
mineral
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)3Si2O5(OH)4
metamorphic
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
metamorphic
Gold Nugget
Native Gold (Au)
mineral
Sphalerite
Zinc Sulfide (ZnS)
mineral
Green Aventurine
Silicon Dioxide (SiO2+KAl2(AlSi3O10)(OH)2)
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Diamond
Carbon (C)
gemstone
Smoky Quartz
Smoky Quartz (SiO2)
mineral
Red Jasper
Silicon Dioxide (SiO2) with Hematite (Fe2O3)
sedimentary
Smoky Quartz
Silicon Dioxide (SiO2) with trace aluminum and irradiation
mineral
Diamond
Carbon (C)
mineral
Silver (Native Silver Mineral)
Ag (Native Silver), Alloyed 90% Ag / 10% Cu
mineral
Pyrite (on a metal substrate)
Iron Sulfide (FeS2)
mineral
Pearl
Aragonite / Calcium Carbonate (CaCO3)
mineraloid
Pearl
Organic gemstone (Calcium carbonate - CaCO3)
mineral