Synthetic Glass (Often Categorized As A Simulated Mineral)

Clear faceted gemstone, likely quartz (rock crystal)

Quartz, silicon dioxide (SiO₂); visual identification is uncertain because the stone is heavily faceted and photographed with flash

Faceted Clear Quartz or Diamond Simulant

Silicon Dioxide (SiO2) if Quartz or Cubic Zirconia (ZrO2) if Synthetic

Corundum (variety Ruby/Sapphire)

Aluminum Oxide (Al2O3)

Turquoise-colored ring stone (possibly turquoise or imitation)

Turquoise, CuAl₆(PO₄)₄(OH)₈·4H₂O; identity cannot be confirmed from the image

Tumbled blue-green stone, possibly aquamarine or chalcedony

Indeterminate from image; possibilities include beryl (Be₃Al₂Si₆O₁₈) or cryptocrystalline quartz (SiO₂)

Iolite (Cordierite)

Cordierite (Magnesium Aluminum Silicate), Mg2Al4Si5O18

Banded Black Onyx (Chalcedony)

Silicon Dioxide (SiO₂)

Fursuit (Synthetic Fur Specimen)

Canis anthropomorphus syntheticus

Gemstone ring (stones not identifiable from image)

Unknown; the ring appears to contain two yellow stones and one colorless stone, possibly faceted gemstones or simulants

Ruby (Corundum)

Aluminum oxide (Al2O3) with Chromium traces

Colorless faceted gemstones, likely quartz (rock crystal)

Quartz, silicon dioxide (SiO₂), trigonal crystal system

Colorless faceted gemstone, likely cubic zirconia

Cubic zirconia (synthetic ZrO₂), possibly glass or quartz

Polished labradorite cabochon

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

Agate (Polished Sphere)

Silicon Dioxide (SiO2)

Blue cabochon gemstone, likely synthetic glass or dyed stone

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

Tumbled turquoise cabochon

Turquoise, CuAl₆(PO₄)₄(OH)₈·4H₂O

The user-provided image does not contain a rock or mineral specimen

Hematite

Iron(III) oxide (Fe2O3)

Diamond (or Diamond Simulant)

Carbon (C) if diamond, various if simulant (e.g., Cubic Zirconia - ZrO2, Moissanite - SiC)

Faceted Diamond or Cubic Zirconia

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

Emerald

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

Ruby

Corundum (Aluminium Oxide with Chromium impurities, Al2O3:Cr)

Asphalt (Bituminous Concrete)

Bituminous mix / Anthropogenic conglomerate

Amethyst ring

Amethyst, purple quartz (SiO₂)

Goldstone (aventurine glass)

Synthetic copper-bearing soda-lime glass; commonly sold as red goldstone

Labradorite cabochon

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

Faceted glass-like gemstone (likely synthetic quartz or cubic zirconia)

Identification uncertain; possibilities include synthetic quartz (SiO₂) or cubic zirconia (ZrO₂)

Pink amethyst or pale pink quartz gemstone

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

Smoky Quartz

Silicon Dioxide (SiO2)

Yellow faceted gemstone, likely citrine or synthetic glass

Citrine (quartz, SiO₂) is the leading natural possibility; visual identification is uncertain from the photograph

Ruby

Corundum (Al2O3)

Opalite

Synthetic Fluorescent Glass (SiO2 + impurities)

Faceted citrine-colored gemstone (likely synthetic/display stone)

Quartz, SiO₂, if natural citrine; possibly synthetic sapphire or glass imitation

Faceted colorless gemstone, likely glass or diamond imitation

Unidentified; possibly diamond (carbon, C) or cubic zirconia (zirconium dioxide, ZrO₂)

Amethyst ring

Amethyst, purple quartz (SiO₂), likely set with diamond or other accent stones

Moonstone cabochon (probable)

Adularescent feldspar, usually orthoclase–albite intergrowth (KAlSi3O8–NaAlSi3O8)

Faceted citrine-colored gemstone

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

Hematite bead bracelet

Hematite (iron(III) oxide, Fe₂O₃), likely polished magnetic hematite or hematite-coated beads

Polished turquoise cabochon pendant

Turquoise, hydrated copper-aluminum phosphate: CuAl₆(PO₄)₄(OH)₈·4H₂O; likely stabilized or matrix-bearing material

Silicon

Crystalline Silicon (Si)

Botryoidal hematite (specular hematite)

Hematite, Fe₂O₃

Yellow Sapphire

Corundum (Al2O3:Fe)