Sedimentary (Synthetic)

Ruby (Pink to Red Corundum)

Al2O3 (Corundum with Chromium impurities)

Ruby

Corundum (Al2O3 with Chromium traces)

Blue Sapphire

Corundum (Al2O3)

Tumbled Clear Quartz and Citrine Points

Silicon Dioxide (SiO2)

Amethyst stud earrings

Amethyst, purple quartz (SiO₂)

Carved labradorite fish

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

Cut red gemstone, likely ruby

Ruby, gem-quality corundum (Al₂O₃) colored by chromium

Green Obsidian Sphere (man-made glass)

Vitreous Silica with Chromium/Iron additives

Green faceted gemstone, likely tsavorite garnet

Tsavorite: green grossular garnet, Ca₃Al₂(SiO₄)₃

Amethyst (Resin Carving/Orgonite)

Silicon Dioxide (SiO2) with iron impurities

Cubic Zirconia (Man-made)

Cubic Zirconia (ZrO2) with Enamel and Metal Alloy

Ruby (faceted gemstone in a ring)

Corundum, Al₂O₃; red color typically from trace chromium

Red corundum (ruby-colored polished crystal)

Corundum, aluminum oxide (Al₂O₃); red color is typically caused by chromium

Amethyst (Tumbled)

Silicon Dioxide (SiO2) with Fe3+ impurities

Blue-and-white opalite sphere

Opalite (commercial synthetic or glass-based imitation; not true opal), typically silica glass or synthetic opalescent material

Dark blue polished stone pendant

Indeterminate; possibly sodalite, lapis lazuli, or blue slag/glass-like material

Carborundum (Silicon Carbide)

Silicon Carbide (SiC)

Cubic Zirconia (Faceted)

Zirconium dioxide (ZrO2)

Silicon

Crystalline Silicon (Si)

Cubic Zirconia (Simulated Diamond)

Zirconium dioxide (ZrO2)

Faceted clear quartz (rock crystal), likely a cut imitation or low-grade gemstone

Quartz, silicon dioxide (SiO₂)

Cut red gemstone in a gold ring

Likely ruby (corundum, Al₂O₃), though red spinel or garnet is also possible from the image

Polished blue stone, likely sodalite or dyed agate

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

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

Faceted blue gemstone, likely aquamarine

Aquamarine—blue beryl, Be₃Al₂Si₆O₁₈; identification is uncertain from the image alone

White cabochon gemstone, likely milky chalcedony or opalite

Chalcedony: microcrystalline quartz, SiO₂; appearance may also indicate synthetic opalite glass

Dyed Agate Geode

Silicon Dioxide (SiO2) with artificial pigment

Emerald (green gemstone) pendant

Emerald, green variety of beryl (Be₃Al₂Si₆O₁₈); stones appear to be faceted and set in jewelry

Blue faceted gemstone ring, likely synthetic sapphire or blue topaz

Uncertain from image; possible corundum (Al₂O₃) or topaz (Al₂SiO₄(F,OH)₂)

Dyed Purple Agate Sliced Tablet

Silicon Dioxide (SiO2), variety Chalcedony

Gemstone-set silver jewelry piece

Likely mixed faceted gemstones in a silver-colored metal setting; stones may include sapphire, ruby/garnet, and yellow sapphire or citrine, but the image is insufficient for species-level identification.

Faceted pale-green gemstone, likely prasiolite or green quartz

Quartz (SiO₂), likely prasiolite; identification is uncertain from the photograph

Blue-green turquoise (probable)

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

Blue Goldstone

Man-made glass with cobalt and metal flecks

Diamond (or Cut Gemstone / Cubic Zirconia)

Carbon (C)

Opalite

Synthetically produced glass (Silicon Dioxide with metallic inclusions)

Smoky Quartz

Smoky Quartz (Silicon Dioxide, SiO2)

Gold-colored gemstone ring, likely citrine or glass imitation

Indeterminate from image; possible quartz (SiO₂) or yellow glass set in gold-colored metal

Tiger’s eye

Quartz (SiO₂), fibrous pseudomorph after crocidolite

Polished amethyst cabochon

Amethyst, purple quartz (SiO₂)

Polished tiger’s eye

Quartz (microcrystalline SiO₂) with crocidolite-derived iron oxides

Green faceted gemstone, likely emerald

Beryl, Be₃Al₂Si₆O₁₈, colored green by chromium and/or vanadium