Synthetic (Ceramic)

Asphalt (Bituminous Concrete)

Bituminous mix / Anthropogenic conglomerate

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

Earthy iron-oxide-rich mineral coating (probable laterite/limonite)

Hydrated iron oxides and oxyhydroxides, chiefly goethite (FeO(OH)) and limonite (variable FeO(OH)·nH₂O), mixed with clay/sand

Peacock Ore

Bornite (Cu5FeS4)

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

Hematite

Iron(III) oxide, Fe2O3

Blue Goldstone

Man-made glass with cobalt and metal flecks

Diamond (or Cut Gemstone / Cubic Zirconia)

Carbon (C)

Emerald

Beryl (Be3Al2(SiO3)6) colored by Chromium and/or Vanadium

Opalite

Synthetically produced glass (Silicon Dioxide with metallic inclusions)

Carborundum (Silicon Carbide)

Silicon Carbide (SiC)

Dark blue polished stone pendant

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

Cubic Zirconia (Faceted)

Zirconium dioxide (ZrO2)

Silicon

Crystalline Silicon (Si)

Cubic Zirconia (Simulated Diamond)

Zirconium dioxide (ZrO2)

Smoky Quartz

Smoky Quartz (Silicon Dioxide, SiO2)

Milky quartz

Quartz (silicon dioxide, SiO₂)

Coarse-grained Quartz and Feldspar Pegmatite

Pegmatite (Quartz: SiO2, Feldspar: KAlSi3O8)

Milky 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

Larimar

Pectolite (NaCa2Si3O8(OH))

Emerald

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

Hematite bead bracelet

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

Blue glass-like gemstone, likely synthetic spinel or glass

Uncertain; possibilities include synthetic cobalt-blue spinel (MgAl₂O₄) or cobalt-colored glass

Colorless faceted gemstone, likely cubic zirconia or diamond

Uncertain from image; cubic zirconia (ZrO₂) is a common diamond simulant, while diamond is crystalline carbon (C)

Diamond ring

Diamond, crystalline carbon (C), likely colorless or near-colorless brilliant-cut stones set in gold

Small faceted gemstone, likely diamond

Diamond (crystalline carbon, C)

Colorless faceted gemstone, likely cubic zirconia

Cubic zirconia (synthetic zirconium dioxide, ZrO₂); possibly colorless quartz or laboratory diamond

Goldstone

Aventurine glass

Faceted glass-like gemstone object

Likely synthetic glass or cubic zirconia; exact material cannot be confirmed from the image

Red faceted gemstone jewelry setting

Likely synthetic ruby or red spinel centerpiece with colorless accent stones; exact identification requires gemological testing

Ruby (Corundum)

Corundum (Aluminum Oxide with Chromium), Al2O3:Cr