Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Category
Synthetic Material (Not A Rock Or Mineral)
Browse synthetic material (not a rock or mineral) specimens identified by the Rock Identifier community.
Learn about Synthetic Material (Not A Rock Or Mineral) in the encyclopedia
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Amethyst (Resin Carving/Orgonite)
Silicon Dioxide (SiO2) with iron impurities
mineral
Diamond (or synthetic simulant)
Cubic C (Carbon)
mineral
Sandstone
Arenite (primary component SiO2)
sedimentary
Opalite
Synthetically produced glass (Silicon Dioxide with metallic inclusions)
Mineraloid (Man-made Glass)
Bismuth Crystal
Bismuth (element symbol Bi, atomic number 83)
mineral
Ruby
Corundum (Al2O3 with Chromium)
mineral
Red cabochon gemstone ring (likely ruby or red spinel; identity unconfirmed)
Possibly corundum (ruby, Al₂O₃) or spinel (MgAl₂O₄); visual identification alone cannot distinguish these from glass or synthetic stones.
gemstone
Emerald
Beryl (Be3Al2(SiO3)6) colored by Chromium and/or Vanadium
mineral
Sandstone
Arenite (SiO2 based)
sedimentary
Blue Sapphire (in a faceted jewelry setting)
Corundum (Al2O3) with trace Iron and Titanium
mineral
Ruby
Corundum (Al2O3)
mineral
Purple faceted gemstone, likely amethyst or synthetic colored corundum
Amethyst: quartz (SiO₂); possible alternative: purple corundum (Al₂O₃) or glass
gemstone
Lapis Lazuli
Lapis lazuli (Rock composed primarily of Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, Calcite, and Pyrite)
metamorphic
Cubic Zirconia and Synthetic Ruby Jewelry
Cubic Zirconia (ZrO2) and Synthetic Corundum (Al2O3)
gemstone
Opal cabochon
Hydrated amorphous silica, SiO₂·nH₂O; likely common or synthetic opal
gemstone
Green Obsidian Sphere (man-made glass)
Vitreous Silica with Chromium/Iron additives
mineralogical simulant
Lapis Lazuli
Lapis Lazuli (Complex aggregate including Lazurite: (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)
metamorphic
Zirconia (Ceramic) & Ion-X Glass
Zirconium Dioxide (ZrO2) and Ion-strengthened Aluminosilicate Glass
Synthetic Mineral / Glass
Ruby
Corundum (Al2O3 with Chromium traces)
mineral
Blue Sapphire
Corundum (Al2O3)
mineral
Tumbled Clear Quartz and Citrine Points
Silicon Dioxide (SiO2)
mineral
Cubic Zirconia (CZ)
Cubic Zirconium Dioxide (ZrO2)
mineral (synthetic)
Opalite
Synthetic Glass / Man-made Opal Simulant
gemstone
Amazonite
KAlSi3O8 (Potassium Feldspar, variety of Microcline)
Mineral
Cubic Zirconia (Diamond Simulant)
Zirconium Dioxide (ZrO2)
gemstone
Cubic Zirconia (Man-made)
Cubic Zirconia (ZrO2) with Enamel and Metal Alloy
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Opalite
Synthetic Opalized Glass (SiO2 + additives)
mineraloid (man-made)
Polished gemstone tower assortment
Primarily quartz varieties and simulants; apparent amethyst (SiO₂), rose quartz (SiO₂), clear quartz (SiO₂), fluorite (CaF₂), sodalite, malachite, and possibly dyed or composite stones
gemstone
Dyed Agate
Chalcedony (SiO2)
mineral
Sapphire
Corundum (Al2O3)
gemstone
Fluorite
Calcium Fluoride (CaF2)
mineral
Amethyst (Tumbled)
Silicon Dioxide (SiO2) with Fe3+ impurities
mineral
Silicon
Crystalline Silicon (Si)
mineral
Quartz (Smoky Quartz variant)
Silicon Dioxide (SiO2)
mineral
Rainbow carborundum (silicon carbide)
Silicon carbide, SiC; commonly synthetic moissanite/carborundum specimen
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Shale with Vein Infillings
Shale (a fine-grained clastic sedimentary rock). The veins could be Calcite (CaCO3), Quartz (SiO2), or other minerals.
Sedimentary Rock
Sandstone
Sandstone (SiO2-rich clastic sedimentary rock)
sedimentary
Diamond (or Cubic Zirconia simulant)
Carbon (C) - Diamond / Zirconium dioxide (ZrO2) - CZ
mineral