Turquoise cabochon jewelry
Turquoise, hydrated copper–aluminum phosphate: CuAl₆(PO₄)₄(OH)₈·4H₂O
gemstone
Category
Synthetic (Man Made Glass)
Browse synthetic (man made glass) specimens identified by the Rock Identifier community.
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Blue chalcedony cabochon (probable)
Chalcedony, cryptocrystalline quartz; silicon dioxide (SiO₂)
gemstone
Emerald in Matrix
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
Chert (Flint / Quartz Nodule)
Microcrystalline Quartz (SiO2)
sedimentary
Smoky Quartz
SiO2 (Silicon Dioxide)
mineral
Chert or Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Pink Sapphire
Corundum (Al2O3 with trace Chromium and Iron)
mineral
Chert (varietal: Flint/Jasper)
Silicon Dioxide (SiO2)
sedimentary
Granodiorite
Granodiorite
Igneous
Sea Glass (Frosted Glass)
Amorphous Silica (SiO2) with various additives
Man-made material (Anthropogenic 'mineraloid')
Pearl
Biogenic CaCO3 (Aragonite and Calcite)
mineral
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Jasper variety)
Silicon Dioxide (SiO2)
sedimentary
Chert (specifically Jasper or Flint)
Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Diamond (or Cubic Zirconia simulant)
C (Carbon) or ZrO2 (Zirconium Dioxide)
gemstone
Diamond (in a jewelry setting)
Diamond (Carbon, C)
mineral
Diamond or Cubic Zirconia
Carbon (diamond) or Zirconium dioxide (cubic zirconia)
gemstone
Emerald
Beryl (Be₃Al₂Si₆Oထ₈) with Chromium/Vanadium impurities
gemstone
Silicon Carbide (Carborundum)
Moissanite (SiC), though mostly synthetic
mineral
Lapidary Wax (imitation/wax model)
Hydrocarbon wax blend with colorant (imitating Lapis Lazuli/Emerald)
mineral
Limonite (Iron Ore)
Limonite; FeO(OH)·nH2O
mineral
Green Slag Glass
Amorphous Silica / Glassy Blast Furnace Slag
Mineraloid (Industrial byproduct)
Diamond (or Diamond Simulant)
Carbon (C) if diamond, various if simulant (e.g., Cubic Zirconia - ZrO2, Moissanite - SiC)
gemstone
Sandstone (Water-worn Cobble)
Arenite (SiO2 with CaCO3 or Fe2O3 cement)
sedimentary
Chert Nodule
Microcrystalline Quartz (SiO2)
sedimentary
Chert (specifically Flint)
Chert (SiO2)
sedimentary
Emerald in Matrix
Beryl (Be3Al2Si6O18) with trace amounts of Chromium/Vanadium
mineral
Sapphire
Corundum (Al2O3)
gemstone
Aura Quartz
Silicon Dioxide (SiO2) with Titanium/Metal vapor coating
mineral
Dalmatian Stone
Dalmatian Jasper (a misnomer) / Perthitic Feldspar Rock
igneous
Diamond (Faceted Colorless)
Diamond (Pure Carbon, C)
mineral
Ruby
Corundum (Al2O3)
mineral
Sandstone
Arenite (SiO2, often with CaCO3 or Fe2O3 cement)
sedimentary
Blue Goldstone
Aventurine Glass (Silicon Dioxide with metal inclusions)
man-made glass mineral simulant
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Blue faceted gemstones, likely blue sapphire
Corundum (Al₂O₃), blue varieties colored chiefly by iron and titanium
gemstone
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Smoky Quartz
Silicon dioxide with aluminum impurities (SiO2)
mineral
Blue glass-like tumbled specimen
Most likely cobalt-blue slag glass or manufactured glass; not confidently identifiable as a natural mineral from the image
mineral
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic