Synthetic Or Natural Fiber

Emerald

Beryl, Be₃Al₂(SiO₃)₆, colored green mainly by chromium and/or vanadium

Agate (Polished Sphere)

Silicon Dioxide (SiO2)

Diamond ring (likely diamond with gold band)

Diamond, crystalline carbon (C); band appears gold alloy

Cubic Zirconia (Simulated Diamond)

Cubic Zirconia (ZrO2)

Satin Spar (Selenite)

Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O

Green beryl gemstone (likely emerald or green beryl)

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

Blue Tiger's Eye

Riebeckite (crocidolite variety)

Polished ruby cabochon (likely synthetic or treated)

Corundum, aluminum oxide (Al₂O₃), colored red by chromium

Man-made Green Quartz (Lab-grown or Treated)

Silicon Dioxide (SiO2) with artificial coloration

Pearl and Garnet Glass

Calcium Carbonate (CaCO3) for pearl; Silicon Dioxide (SiO2) for glass

Smoky Quartz

Silicon Dioxide (SiO2)

Blue glassy mineral specimen, possibly dyed or synthetic

Uncertain; possible blue fluorite (CaF₂), dyed chalcedony, or man-made glass

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

Bismuth

Bismuth (Bi)

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Amethyst ring

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

Blue-green opal, likely polished common or synthetic opal

Opal (hydrated amorphous silica, SiO₂·nH₂O); identification from the image is uncertain

Clear quartz crystal sphere

Quartz (silicon dioxide, SiO₂)

Tumbled turquoise-like stone

Likely turquoise, hydrated copper aluminum phosphate: CuAl₆(PO₄)₄(OH)₈·4H₂O

Turquoise cabochon or turquoise-bearing material

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

Strawberry Quartz (or Sunstone / Tumbled Quartz)

Silicon Dioxide (SiO2) with Hematite/Lepidocrocite inclusions

Ruby

Corundum (Aluminum Oxide with Chromium), Al2O3:Cr

Silicon Carbide (Carborundum)

Silicon Carbide (SiC)

Clear-stone silver-tone teardrop earring

The stones may be colorless quartz or glass; the image does not allow reliable identification. Metal setting appears silver-tone.

Amethyst (Tumbled/Weathered Quartz)

Amethyst (SiO2 with iron impurities)

Pink Dyed Agate

Silicon Dioxide (SiO2) with synthetic pigment

Strawberry Quartz (or Rose Quartz / Cherry Quartz)

Silicon Dioxide (SiO2) with Lepidocrocite, Hematite, or Goethite inclusions

Synthetic Blue Aura Quartz

Silicon Dioxide (SiO2) with Metallic Infusion

Red Tiger's Eye

Pseudomorph of Macrocrystalline Quartz after Crocidolite (SiO2)

Strawberry Quartz and Rose Quartz

Silicon Dioxide (SiO2) with inclusions

Blue slag glass / industrial glass fragment

Artificial silicate glass, composition variable; likely copper- or cobalt-colored furnace slag

Colorless faceted gemstones, likely quartz (rock crystal)

Quartz, silicon dioxide (SiO₂), trigonal crystal system

Tumbled opalite (likely synthetic glass)

Opalite; typically man-made opalescent soda-lime glass, not a recognized mineral species

Dyed Crackle Quartz

Silicon Dioxide (SiO2) with synthetic dye

Likely weathered pebble or mineral fragment

Indeterminate; possibly quartz-rich stone, iron-stained feldspar, or a small chert fragment

Basalt Arrowhead (worked stone)

Aphanitic mafic volcanic rock (Basalt)

Clear gemstone earring (likely cubic zirconia)

Cubic zirconia (synthetic zirconium dioxide, ZrO₂); identification from the image is uncertain

Opalite

Synthetic Glass (Simulated Moonstone/Opal)

Blue chalcedony or dyed agate (tentative)

Microcrystalline quartz, SiO₂; color may be enhanced by dye or coating

Labradorite cabochon

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

Ametrine

Ametrine (SiO2 - Silicon Dioxide with trace amounts of Iron)

Pink faceted gemstone, likely synthetic cubic zirconia or pink sapphire

Uncertain from image; possible zirconium dioxide (cubic zirconia, ZrO₂) or corundum (pink sapphire, Al₂O₃)