Synthetic (Not A Natural Rock)

Diamond

Diamond (C)

Yellow-orange faceted gemstone, likely citrine or yellow topaz

Citrine: quartz, SiO₂; yellow topaz: Al₂SiO₄(F,OH)₂

Faceted citrine-colored gemstone

Likely citrine (quartz, SiO₂); possibly yellow glass or synthetic gem

Tumbled amethyst

Amethyst, purple quartz (SiO₂)

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

Ruby

Corundum (Al2O3 with Chromium trace)

Diamond

Native Carbon (C)

Rough White Zircon

Zircon (Zirconium Silicate, ZrSiO4)

Diamond (Faceted)

Carbon (C)

Goldstone

Aventurine glass

Limonite Ironstone

Goethite-Limonite concretion / Iron oxide

Ruby (Corundum)

Aluminum oxide (Al2O3) with Chromium traces

Pink amethyst or pale pink quartz gemstone

Quartz, SiO₂; pink coloration may result from microscopic inclusions or irradiation-related defects

Cubic Zirconia

Zirconium Dioxide (ZrO2)

Blue cabochon gemstone ring

Likely blue turquoise, glass-filled sapphire, or blue spinel; exact identification requires testing

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.

Silicon Carbide (Carborundum)

Silicon Carbide (SiC)

Blue Sapphire

Corundum (Al2O3)

Opalite

Synthetic Glass (typically Silica/Magnesium based with metal additives)

Ruby (in jewelry)

Corundum (Al2O3 with Chromium traces)

Turquoise

Hydrated copper aluminum phosphate, CuAl₆(PO₄)₄(OH)₈·4H₂O

Clear Quartz crystals on a Matrix base (Geode fragment)

Silicon Dioxide (SiO2)

Red garnet crystal (possible almandine)

Garnet group; likely almandine, Fe₃Al₂(SiO₄)₃

Asphalt / Road Aggregate

Bituminous Conglomerate (synthetic)

Staurolite (Cross Stone)

Staurolite (Fe2+2Al9Si4O23(OH))

Fursuit (Synthetic Fur Specimen)

Canis anthropomorphus syntheticus

Faceted colorless gemstone, likely cubic zirconia or quartz

Uncertain from photograph; cubic zirconia (ZrO₂) is the leading visual possibility, with quartz (SiO₂) as an alternative

White Sapphire

Corundum (Al2O3)

Emerald

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

Limonite

FeO(OH)·n(H2O)

Limonite Nugget

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

Dyed Blue Agate

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Obsidian

Obsidian (Volcanic Glass) SiO2 (70% or more)

Limonite with Pyrite

Hydrated Iron Oxide Hydroxide, FeO(OH)·nH2O

Limonite or Ironstone Nodule

Hydrated iron oxide-hydroxide (FeO(OH)·nH2O)

Faceted blue gemstone, likely aquamarine

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

Carved labradorite fish

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

Asphalt (Road Aggregate)

Asphalt concrete / Bituminous mixture

Opal (in Jewelry Setting)

Hydrated Silicon Dioxide (SiO2·nH2O)

Faceted gemstone ring, likely smoky quartz or garnet in a metal setting

Not determinable from the photograph; possible quartz (SiO₂) or garnet-group silicate

Oak-grain Laminate (Industrial/Decorative Furniture Finish)

Melamine Resin-impregnated Decorative Paper on Particleboard (Cellulose/Thermosetting Plastic)

Coal (Bituminous or Anthracite)

Carbonaceous Sedimentary Rock