Gemstone

Amber (in Matrix/Shale)

Amber (Fossilized Tree Resin)

Smoky Quartz

Smoky Quartz (SiO2: Silicon Dioxide)

Citrine

Silicon Dioxide (SiO2) with Fe3+ impurities

Amethyst

Silicon Dioxide (Quartz variety), SiO2

Opal

Hydrated amorphous silica (SiO2·nH2O)

Diamond-set gold ring (stone identity uncertain)

Possible diamond (crystalline carbon, C); metal setting appears gold-colored

Dyed Fuchsia Tiger’s Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Blue-green gemstone ring, likely treated turquoise or synthetic/treated beryl

Indeterminate from image; possibilities include turquoise (CuAl6(PO4)4(OH)8·4H2O), apatite, or treated beryl

Garnet

Almandine/Pyrope Garnet (Silicate Mineral Group)

Carnelian

Silicon Dioxide, variety of chalcedony (SiO2)

Amethyst

Silicon Dioxide (SiO2) containing iron impurities

Rhodochrosite

Manganese Carbonate (MnCO3)

Emerald

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

Chrysoprase

Silicon Dioxide, SiO2 (Chalcedony variety)

Moonstone

Orthoclase feldspar (KAlSi3O8)

Almandine Garnet

Fe3Al2(SiO4)3

Aquamarine

Beryl (Be3Al2Si6O18)

Aquamarine

Beryl (Be3Al2Si6O18)

Green aventurine bead jewelry

Quartz (SiO₂), commonly with fuchsite or other mica inclusions

Polished red garnet (likely almandine)

Almandine garnet, Fe₃Al₂(SiO₄)₃; identification from the photo is provisional

Sapphire

Corundum (Al2O3)

Amethyst ring

Amethyst, purple quartz (SiO₂)

Chrysoprase

SiO2

Heliodor (Yellow Beryl)

Beryl (Be3Al2Si6O18 with iron impurities)

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Amethyst

Quartz (Silicon Dioxide, SiO2)

Citrine (Heat-Treated Amethyst)

Silicon Dioxide (SiO2)

Amethyst

Quartz (SiO2) - Amethyst variety

Orange fire opal jewelry

Precious opal, hydrated amorphous silica (SiO₂·nH₂O)

Dyed Blue Agate

Chalcedony (SiO2) with artificial dye

Almandine Garnet

Almandine (Fe3Al2(SiO4)3)

Kunzite (Spodumene)

Spodumene (LiAlSi2O6)

Faceted yellow-brown gemstone ring, likely citrine

Citrine (iron-bearing quartz, SiO₂); identification from the photo is uncertain

Faceted colorless gemstone, likely cubic zirconia or diamond

Cubic zirconia (zirconium dioxide, ZrO₂) or diamond (carbon, C)

Green Kyanite

Kyanite (Al2SiO5)

Green Aventurine

Quartz (Silicon Dioxide) with Fuchsite inclusions - SiO2

Diamond (set in an ornate ring)

Diamond, crystalline carbon (C)

Diamond ring

Diamond (crystalline carbon, C)

Red garnet gemstone

Garnet group; likely almandine–pyrope, (Fe,Mg)₃Al₂(SiO₄)₃

Gold ring with a clear faceted gemstone

Likely diamond (crystalline carbon, C); identification is uncertain from the image

Lava Rock (Dyed)

Basalt / Volcanic scoria

Luminous Stone (Glow-in-the-dark Synthetic/Man-made Stone)

Strontium Aluminate tinted glass or resin (Crystalline silicate/oxide mix)