Mineral Simulant (Synthetic Glass)

Amethyst (faceted gemstone)

Quartz, silicon dioxide (SiO₂), purple variety colored mainly by iron-related defects

Smoky Quartz

Silicon Dioxide (SiO2)

Opalite

Synthetic Glass (Simulated Moonstone/Opal)

Blue Sapphire

Corundum (Al2O3 with trace Titanium and Iron)

Diamond-set gold ring

Diamond (carbon, C) in a gold alloy setting; the image does not establish the stone’s identity or authenticity

Diamond

Diamond (pure carbon; C)

Ruby (varieties of Corundum)

Aluminum oxide (Al2O3) with Chromium traces

Red gemstone ring, possibly synthetic ruby or red glass

Unidentified red stone; ruby is corundum (Al₂O₃), but the image cannot confirm its identity

Strawberry Quartz

Silicon Dioxide with Hematite inclusions (SiO2 + Fe2O3)

Amethyst jewelry centerpiece

Amethyst, purple quartz (SiO₂), likely set with colorless diamonds or other gems

Blue glassy mineral specimen, possibly blue topaz or aquamarine

Tentatively topaz (Al₂SiO₄(F,OH)₂) or beryl/aquamarine (Be₃Al₂Si₆O₁₈); identification is limited by severe image blur

Diamond (or Cut Gemstone Simulants)

Carbon (C)

Gem-set gold ring

Unidentified transparent gemstone, possibly quartz or glass, set in a gold-colored metal ring

Blue faceted gemstone, likely sapphire

Corundum (Al₂O₃), likely blue sapphire; identity cannot be confirmed from the photograph alone

Pink faceted gemstone, possibly pink sapphire

Uncertain from the image; possibly corundum (Al₂O₃)

Silicon Carbide

Silicon Carbide, SiC

Polished blue stone, likely sodalite or dyed agate

Most consistent with sodalite (Na₈(Al₆Si₆O₂₄)Cl₂), though the image cannot confirm composition

Diamond (or Cubic Zirconia simulant)

C (Carbon) or ZrO2 (Zirconium Dioxide)

Cubic Zirconia

Zirconium Dioxide (ZrO2)

Turquoise cabochon or turquoise-bearing material

Turquoise, hydrated copper aluminum phosphate — CuAl₆(PO₄)₄(OH)₈·4H₂O

Gold and Cubic Zirconia (San Judas Tadeo Pendant)

Native Gold (Au) with Synthetic Cubic Zirconia (ZrO2)

Green gemstone ring, possibly emerald

The green stone may be emerald (beryl, Be₃Al₂Si₆O₁₈), but the photo cannot confirm its identity; the setting appears to be silver-colored metal.

Faceted clear gemstone in a gold-tone ring

Likely colorless quartz (SiO₂); the image does not establish the stone identity, and glass or another gem is possible

Emerald

Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities

Smoky Quartz

Silicon Dioxide (SiO2)

Hematite cameo or hematine imitation

Hematite (Fe₂O₃); possibly synthetic hematine or black glass

Likely smoky quartz cabochon ring

Quartz, silicon dioxide (SiO₂), brown variety colored by irradiation and trace aluminum

Yellow faceted gemstone, likely citrine or yellow beryl

Quartz (SiO₂), if citrine; beryl (Be₃Al₂Si₆O₁₈), if heliodor

Goldstone (Brown)

Aventurine Glass (Silicon Dioxide infused with Copper crystals)

Blue stone cabochon, likely lapis lazuli or dyed stone

Lapis lazuli: lazurite-rich rock, chiefly (Na,Ca)₈(AlSiO₄)₆(S,SO)₂; exact identification is uncertain from the image

Tumbled labradorite beads

Labradorite, a calcium-rich plagioclase feldspar (approximately (Ca,Na)(Al,Si)₄O₈)

Asphalt / Road Aggregate

Bituminous Conglomerate (synthetic)

Smoky Quartz

Silicon Dioxide (SiO2)

Ruby (Rough/Raw)

Corundum (Al2O3:Cr)

Tiger’s eye

Quartz (SiO₂), fibrous pseudomorph after crocidolite

Imitation or Cultured Pearl Earrings

Calcium carbonate (CaCO3) or synthetic polymer/glass

Blue Goldstone

Synthetic glass with cobalt and copper inclusions

Diamond

Natural Diamond (Carbon, C)

Faceted gemstone in a jewelry setting

Indeterminate from image; likely quartz, cubic zirconia, or another transparent faceted stone

Cubic Zirconia (Jewelry Setting)

Zirconium Dioxide (ZrO2)

Citrine

Silicon Dioxide (SiO2)

Dyed howlite or turquoise imitation

Howlite: Ca₂B₅SiO₉(OH)₅; turquoise: CuAl₆(PO₄)₄(OH)₈·4H₂O