Ruby (in costume jewelry context)
Corundum (Al2O3) with Chromium impurities
mineral
Category
Mineraloid (Synthetic)
Browse mineraloid (synthetic) specimens identified by the Rock Identifier community.
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Man-made Synthetic Material (Costume Faux Fur)
Synthetic Polymer (Polyester/Acrylic)
not a rock
Opalite
Synthetic glass / Opalized glass
gemstone
Cubic Zirconia (simulant) or Diamond
ZrO2 (Cubic Zirconia) or C (Diamond)
gemstone
Opalite (Synthetic Moonstone/Sea Opal)
Silicon Dioxide (SiO2) glass with metallic inclusions
Synthetic/Man-made Glass
Diamond (or Cubic Zirconia)
Cubic Carbon (C) or Zirconium Dioxide (ZrO2)
gemstone
Faceted Clear Quartz or Diamond Simulant
Silicon Dioxide (SiO2) if Quartz or Cubic Zirconia (ZrO2) if Synthetic
gemstone
Amber
Succinite (Organic Mineraloid)
mineral
Faceted Clear Gemstone (Likely Quartz or Cubic Zirconia)
Silicon Dioxide (SiO2) or Zirconium Dioxide (ZrO2)
gemstone
Clear Quartz (Faceted) or Cubic Zirconia / Glass imitation
SiO2 (if Quartz), ZrO2 (if Cubic Zirconia)
mineral
Faceted Quartz or Cubic Zirconia
SiO2 (Quartz) or ZrO2 (Cubic Zirconia)
gemstone
Opalite
Synthetic Opalite Glass / Opalized Glass
gemstone
Opalite
Synthetic opalescent glass
glass
Ruby (Raw Corundum)
Al2O3 (Aluminum Oxide)
mineral
Opalite
Synthetic Opalised Glass
glass
Opalite
Synthetic Opalised Glass
mineral
Asphalt / Road Aggregate
Bituminous Conglomerate (synthetic)
sedimentary
Opalite
Synthetic Opalized Glass
gemstone
Opalite
Synthetic Opalised Glass
Mineral (Synthetic / Man-made)
Opalite
Synthetic Opalised Glass
mineral
Opalite (Man-made Glass)
Synthetic Opalised Glass
mineral
Cubic Zirconia (Jewelry Setting)
Zirconium Dioxide (ZrO2)
gemstone
Mahogany Obsidian
Volcanic glass (high silica) with inclusions of Magnetite or Hematite
igneous
Obsidian
Volcanic glass (SiO2 + impurities)
igneous
Opalite
Synthetic glass / Opaque silicious glass
gemstone
Blue Goldstone
Man-made glass with crystalline copper/cobalt inclusions
mineral
Note on Image Identification: Textile
N/A (Anthropogenic material)
not a rock
Cubic Zirconia and Synthetic Ruby Jewelry
Cubic Zirconia (ZrO2) and Synthetic Corundum (Al2O3)
gemstone
Gemstone Ring
Various (Likely Glass, Cubic Zirconia, or assorted semi-precious stones)
gemstone
Goldstone
Aventurine Glass (Man-made)
mineral
Ceramic or Polished Stone Heart (Anthropogenic Material)
Glazed Ceramic (Silicon Dioxide based coating on Alumina Silicate body) or Polished Limestone/Marble (Calcium Carbonate, CaCO3)
Synthetic/Anthropogenic Mineraloid
Limonite or Ironstone Nodule
FeO(OH)·nH2O (Hydrated iron(III) oxide-hydroxide)
sedimentary
Black Obsidian
Volcanic Glass (predominantly SiO2)
igneous
Opalite
Man-made glass (traditionally simulated Opal)
mineral
Black Obsidian
Volcanic Glass (Amorphous SiO2 with trace impurities)
igneous
Blue Sapphire (likely costume glass imitation)
Corundum (Al2O3) with iron/titanium impurities
mineral
Costume Jewelry with Synthetic Gemstones
Synthetic Cubic Zirconia and Glass (SiO2 / ZrO2)
mineral
Silicon Carbide (Carborundum)
Silicon Carbide, SiC
mineral
Luminous Stone (Glow-in-the-dark Synthetic/Man-made Stone)
Strontium Aluminate tinted glass or resin (Crystalline silicate/oxide mix)
mineral (synthetic)
Black Obsidian
Volcanic glass
igneous
Obsidian
Volcanic Glass
igneous
Obsidian
Volcanic Glass (Amorphous silicon dioxide with impurities)
igneous