Mineraloid (Synthetic)

Limonite (Ironstone Concretion)

Limonite (Hydrated iron(III) oxide-hydroxide, mixtures of FeO(OH)·nH2O)

Blue cabochon gemstone, likely synthetic glass or dyed stone

Indeterminate from image; possible glass, synthetic spinel, sodalite, or lapis lazuli

Opalite

Synthetic Glass (Hydrated Silica Simulant)

Blue Goldstone

Synthetic glass with cobalt and copper inclusions

Blue Goldstone

Synthetic Avanturine Glass (or Aventurine Glass)

Lava Stone and Chakra Beads

Basalt (with various mineral/synthetic beads)

Synthetic Ruby (Jewel Bearings)

Synthetic Corundum (Al2O3 doped with Chromium)

Blue Cracked Quartz (Dyed Fire Crackle Quartz)

Silicon Dioxide (SiO2) with synthetic dye

Pink faceted gemstone ring (stone uncertain)

Possibly tourmaline or glass; image alone cannot establish identity

Faceted colorless gemstone, likely quartz (rock crystal)

Quartz, SiO₂

Emerald in Matrix

Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities

Smoky Quartz

Silicon Dioxide (SiO2)

Blue sapphire (likely synthetic or treated corundum)

Corundum, aluminum oxide (Al₂O₃), blue from iron and titanium impurities

Ruby (mounted cabochon)

Corundum, Al₂O₃; red color typically from chromium

Cubic Zirconia (as a jewelry specimen)

Zirconium dioxide (ZrO2)

Blue Sapphire (likely lab-grown or treated)

Corundum (Aluminum Oxide, Al2O3)

Opalite (a synthetic glass)

Silicon Dioxide (SiO2) with various additives; not a true mineral but a man-made gem simulant

Colorless faceted gemstone (likely cubic zirconia)

Cubic zirconia, ZrO₂ (synthetic zirconium dioxide); possibly synthetic glass or lab-grown diamond

Ruby (Corundum in Ring Setting)

Corundum (Al2O3:Cr)

Malachite

Copper carbonate hydroxide [Cu2CO3(OH)2]

Faceted Diamond or Cubic Zirconia

Carbon (C) for Diamond; Zirconium dioxide (ZrO2) for CZ

Blue sapphire ring

Corundum, aluminum oxide (Al₂O₃), blue variety colored mainly by iron and titanium

Blue sapphire

Corundum, aluminum oxide (Al₂O₃), colored blue mainly by iron and titanium

Blue gemstone ring, likely sapphire

Corundum, Al₂O₃ (probable blue sapphire); surrounding stones may be diamonds or simulants

Blue Sapphire

Corundum (Al2O3) with traces of Iron and Titanium

Pearl (Biogenic Mineral)

Calcium Carbonate (primarily Aragonite) with Conchiolin; CaCO3

Polished mahogany obsidian

Volcanic glass; primarily silica-rich rhyolitic composition (approximately 70–75% SiO₂)

Bumblebee Jasper

Calcite with Arsenic and Sulfur inclusions

Obsidian

Obsidian (Volcanic Glass)

Obsidian (Gold Sheen)

Obsidian (SiO2 + impurities)

Mahogany Obsidian

Volcanic Glass (SiO2 + Fe2O3)

Mahogany Obsidian

Volcanic glass containing Hematite or Magnetite (SiO2 + Fe2O3)

Snowflake Obsidian

Volcanic Glass (SiO2) with Cristobalite inclusions

Obsidian

Volcanic Glass (SiO2 + impurities)

Faceted blue gemstone, likely blue sapphire

Corundum (Al₂O₃); identification from the image is provisional

Colorless faceted gemstone, likely glass or cubic zirconia

Probably cubic zirconia (zirconium dioxide, ZrO₂); diamond cannot be confirmed visually

Cubic Zirconia (Faceted)

Zirconium dioxide (ZrO2)

Anthropogenic Heat Source (Electronic/Industrial Interface)

Thermal IR emission (Electronic infrastructure)

Cubic Zirconia

Zirconium Dioxide (ZrO2)

Blue Sapphire (Synthetic or Man-made Glass Imitation)

Corundum (Al2O3) if natural; Lead-glass or Spinal if synthetic

Diamond-set gold ring (stone identity uncertain)

Possible diamond (crystalline carbon, C); metal setting appears gold-colored

Faceted red gemstone, likely ruby

Corundum (Al₂O₃), colored red by chromium; identification from the image is uncertain