Diamond (or Diamond Simulant)
Carbon (C) if diamond, various if simulant (e.g., Cubic Zirconia - ZrO2, Moissanite - SiC)
Category
Browse mineral (synthetic) specimens identified by the Rock Identifier community.
Diamond (or Diamond Simulant)
Carbon (C) if diamond, various if simulant (e.g., Cubic Zirconia - ZrO2, Moissanite - SiC)
Man-made Jewelry (Metal and Glass/Plastic)
Synthetic Alloy and Amorphous Solid (SiO2/Polymer)
Synthetic Zinc/Polycarbonate Composite (Bey-specimen)
Zinc Alloy (Zamak 3) with Polycarbonate (C15H16O2)n Overlay
Polished blue-black cabochon, likely blue obsidian or dyed glass-like stone
Indeterminate from image; possible natural obsidian (volcanic glass), commonly SiO₂-rich rhyolitic glass
Lapis Lazuli
Lapis Lazuli (a rock composed primarily of Lazurite (Na,Ca)₈[(S,Cl,SO₄,OH)₂|(Al₆Si₆O₂₄)], with varying amounts of Calcite, Pyrite, and Sodalite.)
White Opal
Hydrated Amorphous Silica (SiO2·nH2O)
Turquoise
Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]
Likely diamond accent
Diamond (crystalline carbon, C)
Goldstone (Red/Brown)
Aventurine Glass (SiO2 with Copper inclusions)
Sapphire (likely blue synthetic sapphire or blue glass in a ring)
Corundum (Al₂O₃), specifically the blue variety due to trace amounts of iron and titanium impurities. If synthetic, it would still be Al₂O₃.
Corundum
Corundum (Al2O3)
Diamond
Carbon (C), Native Element
Goldstone (aventurine glass)
Synthetic copper-bearing soda-lime glass; commonly sold as red goldstone
Likely citrine or yellow glass imitation in a silver-tone bracelet
Citrine: quartz, SiO₂; exact material cannot be confirmed visually
Lapis Lazuli
Lapis lazuli (complex rock; primarily Lazurite: (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)
Pearls (likely freshwater cultured pearls)
Pearl: nacre, primarily aragonite (CaCO₃) with conchiolin
Opal
Hydrous silicon dioxide (SiO2·nH2O)
Anthracite Coal
Anthracite (Carbon ≥ 86%)
Yellow Sapphire
Corundum (Al2O3:Fe)
Diamond (Faceted)
Carbon (C)
Green glassy cabochon, likely dyed or synthetic material
Uncertain; possibly green obsidian, chrysoprase, or synthetic glass
Ruby (Faceted)
Corundum (Al2O3 with Cr trace elements)
Blue Goldstone
Aventurine Glass (SiO2 with Cobalt/Copper inclusions)
Diamond (Faceted)
Diamond (Pure Carbon, C)
Blue Opal Inlay (Simulated/Lab-created)
Hydrated Amorphous Silica (SiO2·nH2O) with polymer resin
Black Tourmaline
Schorl (Na(Fe²⁺)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄)
Diamond (appearing as a jewelry centerpiece)
Diamond (Formula: C)
Blue Goldstone
Aventurine Glass
Bismuth
Bismuth (Bi)
Yellow-orange faceted gemstone, likely citrine or yellow topaz
Citrine: quartz, SiO₂; yellow topaz: Al₂SiO₄(F,OH)₂
Opal (in Jewelry Setting)
Hydrated Silicon Dioxide (SiO2·nH2O)
Lapis Lazuli
Lapis Lazuli (Complex aggregate including Lazurite: (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)
Terrazzo (Synthetic Composite Rock)
Cementitious or Epoxy Resin-bound Aggregates
Sapphire
Corundum (Al2O3)
Strawberry Quartz
Silicon Dioxide (SiO2) with inclusions of Goethite or Hematite
Lapis Lazuli (in Matrix)
Na8[Al6Si6O24]S2 (Lazurite as the primary component)
Synthetic Resin Charm (Seal Shape)
Polymer Resin with plastic glitter / Polyethylene terephthalate glitters
Blue Sapphire
Corundum (Al2O3)
Rutilated Quartz
SiO2 with TiO2 inclusions (Rutile)
Faceted yellow gemstone, likely citrine
Citrine (quartz), SiO₂; possibly yellow sapphire or synthetic glass without testing
Ring with an Orange Inlay
N/A (Man-made object)
Black Tourmaline
Schorl (Na(Fe²⁺)₃Al₆(OH)₄(BO₃)₃Si₆O₁₈)