Mineral (Synthetic Glass)

Smoky Quartz

Silicon Dioxide (SiO2)

Iridescent polished gemstone, likely opal

Common or precious opal (hydrated amorphous silica, SiO₂·nH₂O), possibly synthetic or glass imitation

Smoky Quartz

Silicon Dioxide (SiO2)

Smoky Quartz

Silicon Dioxide (SiO2) with aluminum impurities and natural radiation

Faceted clear gemstone, likely quartz or glass imitation

Most likely quartz (SiO₂); exact identification requires refractive-index and hardness tests

Beach Pebble Quartzite / Chalcedony Pebble

Silicon Dioxide (SiO2)

Blue quartz crystal (likely synthetic or coated quartz)

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

Tourmalinated Quartz

Crystalline Silicon Dioxide with Schorl inclusions (SiO2 + NaFe3Al6(BO3)3Si6O18(OH)4)

Diamond (or Cubic Zirconia)

Carbon (C) or Zirconium Dioxide (ZrO2)

Blue glass-like heart pendant, likely synthetic blue spinel or colored glass

Unconfirmed; possibly synthetic spinel (MgAl₂O₄) or cobalt-colored glass

Green beryl gemstone (likely emerald or green beryl)

Beryl, Be₃Al₂Si₆O₁₈; green color from chromium/vanadium or iron

Green cabochon gemstone, likely aventurine or dyed chalcedony

Indeterminate from image; possible quartz variety (SiO₂), including aventurine quartz or chalcedony

Amethyst gemstone ring

Quartz, purple variety — SiO₂

Black faceted gemstone, likely spinel or black tourmaline

Most plausibly black spinel (MgAl₂O₄); visually similar possibilities include schorl tourmaline (NaFe₃Al₆(BO₃)₃Si₆O₁₈(OH)₄) or synthetic glass

Gold-colored gemstone ring, likely citrine or glass imitation

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

Artificial Rock Face (Faux Rock)

Glass Fiber Reinforced Concrete (GFRC)

White seed-bead gemstone strand, likely freshwater pearl or shell pearl

Pearl: nacreous calcium carbonate, chiefly aragonite (CaCO₃) in conchiolin; identification uncertain from image

Tumbled amethyst

Amethyst, purple quartz (SiO₂), colored by trace iron and irradiation

Rose Quartz

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

Yellow faceted gemstone, likely citrine or yellow sapphire

Uncertain; probable quartz (SiO₂) or corundum (Al₂O₃)

Man-made Synthetic Material (Plastic/Composite)

Acrylonitrile Butadiene Styrene (ABS) or High-Impact Polystyrene (HIPS)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Blue Sapphire

Corundum (Al2O3)

Raw Topaz

Aluminum Silicate Fluoride Hydroxide, Al2SiO4(F,OH)2

White cabochon gemstone, likely milky chalcedony or opalite

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

Turquoise cabochon jewelry

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

Mixed gemstone jewelry collection

Various gemstone minerals, including likely amethyst (quartz), sapphire or iolite, garnet, pearl, turquoise, and colored beryl or tourmaline

Heart-shaped faceted gemstone pendant

Likely yellow quartz (citrine) or synthetic yellow stone, set in metal with small clear accent stones

Blue-green tumbled gemstone, likely turquoise or dyed turquoise

Turquoise: hydrated copper–aluminum phosphate, CuAl₆(PO₄)₄(OH)₈·4H₂O; identification is uncertain from the blurry image

Smoky Quartz

Smoky Quartz (Silicon Dioxide - SiO2)

Blue Sapphire

Corundum (Al2O3 with trace Titanium and Iron)

Clear quartz sphere

Quartz (silicon dioxide, SiO₂), likely rock crystal or low-grade milky quartz

Tumbled amethyst

Amethyst, purple quartz (SiO₂)

Dyed Quartz Pendant

Silicon Dioxide (SiO2) with artificial dye

Cubic Zirconia

Cubic Zirconium Dioxide (ZrO2)

Polished pink quartz cabochon

Quartz (SiO₂), likely rose quartz or included quartz

Polished honey-yellow quartz-like crystal

Quartz (SiO₂), possibly citrine or heat-treated amethyst

Polished blue-black cabochon, likely blue obsidian or dyed glass-like stone

Indeterminate from image; possible natural obsidian (volcanic glass), commonly SiO₂-rich rhyolitic glass

Carborundum (Silicon Carbide)

Silicon Carbide (SiC)

Cubic Zirconia (Simulated Diamond)

Zirconium dioxide (ZrO2)

Rose Quartz

Silicon Dioxide (SiO2)

Blue cabochon ring stone, likely sapphire or synthetic blue corundum

Corundum (Al₂O₃), possibly chromium/iron-titanium-bearing sapphire