Synthetic Polymer (Polylactic Acid)

Blue gemstone, likely iolite or blue sapphire

Iolite (cordierite, Mg₂Al₄Si₅O₁₈) or corundum (sapphire, Al₂O₃)

Black onyx or black spinel ring stone

Likely chalcedony (SiO₂), variety black onyx; possibly synthetic spinel or glass

Strawberry Quartz

Silicon Dioxide with Hematite inclusions (SiO2 + Fe2O3)

Zircon

Zirconium Silicate (ZrSiO₄)

Blue Goldstone

Aventurine Glass

Opalite

Man-made opalescent glass (SiO2 + metal oxides)

Green aventurine bead (likely)

Quartz, SiO₂, with green fuchsite inclusions

Assorted gemstone jewelry

Mixed natural and synthetic gemstone cabochons and faceted stones; individual species cannot be determined reliably from this image

Opalite (likely man-made glass)

Opalite; amorphous silica glass, not a natural mineral

Tumbled dalmatian jasper (likely)

Microcrystalline quartz/chalcedony with black amphibole or aegirine inclusions; commonly sold as “dalmatian jasper”

Bismuth crystal

Bismuth (Bi), commonly laboratory-grown

Tiger’s-eye

Chatoyant quartz (SiO₂), commonly pseudomorphic quartz after crocidolite

Dalmatian Stone

Dalmatian Stone (Felsic Igneous Rock)

Sapphire (Blue)

Corundum (Al2O3)

White Sapphire

Corundum (Al2O3)

Blue quartz crystal (likely synthetic or coated quartz)

Quartz, silicon dioxide (SiO₂); possible aqua-aura quartz

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

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

Diamond

Carbon (C)

Jadeite and Mixed Gemstones (Ruby, Sapphire, Emerald)

Jadeite (NaAlSi2O6), Corundum (Al2O3), Beryl (Be3Al2(Si6O18))

Opalite

Man-made opalized glass

Goldstone

Aventurine Glass (SiO2 + Cu small inclusions)

Likely diamond accent

Diamond (crystalline carbon, C)

Green Glass (often marketed as 'Obsidian' or 'Green Quartz')

Amorphous Silica (SiO2) with copper or chromium additives

Ruby

Corundum (Al2O3 with Chromium traces)

Blue Sapphire

Corundum (Al2O3)

Corundum (variety Ruby/Sapphire)

Aluminum Oxide (Al2O3)

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Smoky Quartz

Silicon Dioxide (SiO2)

Turquoise ring

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

Amethyst ring

Amethyst, purple quartz (SiO₂)

Tanzanite earrings

Tanzanite, blue-violet zoisite (Ca₂Al₃(SiO₄)₃(OH))

Man-made Polished Porcelain Tile (Artificial Geologic Lookalike)

Fused Silicate Ceramic with Alumina (Synthetic Kaolinite derivative)

Raw ruby (likely corundum)

Corundum, Al₂O₃; red color caused mainly by chromium

Rose Quartz

Silicon Dioxide (SiO2)

Anthracite Coal

Anthracite (Carbon ≥ 86%)

Amethyst cabochon

Quartz, silicon dioxide (SiO₂), purple variety colored mainly by iron impurities and irradiation

Amber

Succinite (Fossilized Resin)

Amber

Succinite (Resinite)

Amber

Succinite (fossilized tree resin)

Amber

Succinurite (C10H16O)

Amber

Succinite

Tumbled amber

Fossilized plant resin; commonly succinite (organic polymerized resin)