Turquoise cabochon
Turquoise, hydrated copper aluminum phosphate — CuAl₆(PO₄)₄(OH)₈·4H₂O
gemstone
Category
Synthetic (Glass)
Browse synthetic (glass) specimens identified by the Rock Identifier community.
Learn about Synthetic (Glass) in the encyclopedia
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Polished hematite bead necklace
Hematite (iron(III) oxide, Fe₂O₃), likely polished beads
mineral
Clear Quartz (Faceted) / White Sapphire / Goshenite
Silicon Dioxide (SiO2) / Aluminium Oxide (Al2O3)
gemstone
Emerald (green gemstone in a jewelry setting)
Beryl, Be₃Al₂(SiO₃)₆; green color commonly from chromium and/or vanadium
gemstone
Moonstone ring
Moonstone, a feldspar variety (typically orthoclase or adularia; KAlSi₃O₈)
gemstone
Hematite
Iron(III) oxide (Fe2O3)
mineral
Chrysocolla in Malachite
Cu2CO3(OH)2 (Malachite) / Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (Chrysocolla)
mineral
Red gemstone ring, likely synthetic ruby or garnet
Ruby: corundum (Al₂O₃); possible alternative: almandine garnet (Fe₃Al₂(SiO₄)₃)
gemstone
Cubic Zirconia (Diamond Simulant)
Zirconium Dioxide (ZrO2)
gemstone
Cubic Zirconia (Jewelry Setting)
Cubic Zirconia (ZrO2)
gemstone
Cubic Zirconia (Faceted)
Zirconium Dioxide (ZrO2)
mineral
Diamond (or Diamond Simulant)
Carbon (C)
gemstone
Opal stud earrings
Opal, hydrated amorphous silica (SiO₂·nH₂O)
gemstone
Orange Sapphire
Corundum (Al2O3)
gemstone
Ametrine
Silicon Dioxide (SiO2) with iron impurities
mineral
Cubic Zirconia (Faceted Gemstone)
Zirconium dioxide (ZrO2)
gemstone
Ruby (faceted gemstone)
Corundum (Al2O3 with Cr impurities)
gemstone
Blue Sapphire
Corundum (Al2O3)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Hematite
Hematite (Fe₂O₃), likely a polished specular hematite palm stone
mineral
Rough White Zircon
Zircon (Zirconium Silicate, ZrSiO4)
mineral
Ruby
Corundum (Aluminum Oxide with Chromium), Al2O3:Cr
mineral
Diamond (in jewelry)
Cubic Carbon (C)
mineral
Rainbow carborundum (silicon carbide)
Silicon carbide, SiC; commonly synthetic moissanite/carborundum specimen
mineral
Staurolite (Fairy Stone)
Staurolite (Fe2+2Al9Si4O23(OH))
metamorphic
Ruby
Corundum (Al2O3 with Chromium impurities)
mineral
Malachite
Cu2CO3(OH)2 (Copper Hydroxide Carbonate)
mineral
Assorted Semi-Precious Gemstone Crosses
Quartz, Silicates, Carbonates (various)
mineral
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.
Mineral
Silicon Carbide (Carborundum)
Silicon Carbide (SiC)
mineral
Blue Agate Geode (Dyed)
Cryptocrystalline Quartz (SiO2)
mineral
Acrylic or Resin (Synthetic Imitation)
Polymethyl Methacrylate (PMMA) or Polyepoxide
Synthetic/Man-made Polymer
Ruby
Corundum (Al2O3 with Chromium traces)
mineral
Emerald
Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)
gemstone
Diamond (or high-quality simulant like Cubic Zirconia)
Carbon (C) - Native Element
mineral
Blue quartz (likely dyed or synthetic-treated quartz beads)
Quartz, silicon dioxide (SiO₂)
mineral
Polished ruby cabochon (likely synthetic or treated)
Corundum, aluminum oxide (Al₂O₃), colored red by chromium
gemstone
Diamond
Diamond (C)
gemstone
Borosilicate Glass (Manufactured)
SiO2 + B2O3 (Silicon dioxide and Boron trioxide)
Synthetic/Amorphous Solid
Turquoise cabochon pendant
Turquoise, hydrated copper aluminum phosphate — CuAl₆(PO₄)₄(OH)₈·4H₂O
gemstone
Tumbled turquoise cabochon
Turquoise, CuAl₆(PO₄)₄(OH)₈·4H₂O
mineral
Note: This is a Man-Made Object (Costume/Prop Patch)
Synthetic fiber and pigments (Cellulose/Plastic-based composite)
Non-geological