Mineral (Treated)

Tumbled pale-green quartz, likely prasiolite or green aventurine

Quartz (SiO₂), with minor iron- or other mineral-related coloring

Tumbled yellow quartz

Quartz (SiO₂), likely iron-stained milky quartz or pale citrine

Quartz (Citrine / Yellow Quartz)

Silicon Dioxide (SiO2)

Yellow Quartz / Citrine Quartz

Silicon Dioxide (SiO2)

Black Onyx

Cryptocrystalline Quartz (SiO2)

Onyx (Black Onyx)

Silicon Dioxide (SiO2) - Chalcedony variety

Faceted blue gemstone, likely blue topaz or synthetic spinel

Topaz (Al₂SiO₄(F,OH)₂) or synthetic spinel (MgAl₂O₄); image insufficient for certainty

Lapis lazuli and green-blue chalcedony jewelry

Lapis lazuli: lazurite-bearing metamorphic rock, chiefly lazurite (Na₃Ca(Al₃Si₃O₁₂)S) with calcite and pyrite; second stone: likely chrysoprase or green-blue chalcedony (microcrystalline quartz, SiO₂)

Red Tiger's Eye

Silicified Crocidolite (SiO2 with iron oxide inclusions)

Bornite (peacock ore), likely with chalcopyrite

Bornite, Cu5FeS4; associated copper sulfides may include chalcopyrite, CuFeS2

Bornite

Bornite (Cu5FeS4)

Yellow Quartz / Citrine Quartz

Silicon Dioxide (SiO2)

Faceted quartz crystal sphere (likely rock crystal)

Quartz, silicon dioxide (SiO₂)

Faceted yellow-brown gemstone ring

Likely citrine (quartz, SiO₂); the image alone cannot confirm the stone or any treatments.

Orange Calcite

Calcium Carbonate (CaCO3)

Jadeite (Jade)

Jadeite; NaAlSi2O6

Green gemstone ring, likely emerald simulant or jade

Uncertain; possible beryl (emerald, Be₃Al₂Si₆O₁₈) or jadeite (NaAlSi₂O₆), but the blurred image may show synthetic glass or another treated stone

Amber

Succinite (specifically for Baltic amber); approximate formula C10H16O

Opal ring

Common opal, likely synthetic or assembled blue-green opal (hydrated amorphous silica, SiO₂·nH₂O)

Pink tourmaline crystal (probable)

Elbaite tourmaline, Na(Li,Al)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄

Citrine (likely Heat-Treated Amethyst)

Silicon Dioxide (SiO2)

Fossil shark tooth

Likely a fossilized shark tooth, possibly *Carcharodon* or *Carcharhinus*; exact species requires provenance and close examination

Yellow Quartz (Citrine or Quartzite Pebble)

Silicon Dioxide (SiO2)

Black Onyx

Onyx (Silicon Dioxide, SiO2)

Citrine (Raw)

Silicon Dioxide (SiO2) with iron impurities

Tumbled carnelian (orange chalcedony)

Carnelian, a microcrystalline variety of quartz; silicon dioxide (SiO₂) colored mainly by iron oxides

Black Onyx

Silicon Dioxide (SiO2) - variety of Chalcedony

Faceted colorless quartz (rock crystal)

Quartz, silicon dioxide (SiO₂)

Turquoise (rough, likely stabilized or treated)

Turquoise, CuAl₆(PO₄)₄(OH)₈·4H₂O

Decorated turquoise-like bead or mineral pendant

Likely turquoise [CuAl₆(PO₄)₄(OH)₈·4H₂O], possibly dyed composite or blue-green jasper

Bornite

Bornite (Cu5FeS4)

Turquoise

Hydrated copper aluminum phosphate, CuAl₆(PO₄)₄(OH)₈·4H₂O

Blue Topaz

Al2SiO4(F,OH)2

Likely polished amber or amber-like resin specimen

Amber (fossilized plant resin), chiefly polymerized diterpenoid resin; exact identification uncertain from the image

Yellow Quartz (Citrine alternative)

Silicon Dioxide (SiO2) with iron impurities

Carnelian (a variety of Chalcedony)

Silicon Dioxide (SiO₂)

Chrome Diopside

Magnesium Calcium Silicate (MgCaSi2O6) containing Chromium impurities

Sapphire

Corundum (Al2O3)

Yellow Quartz (Citrine/Yellow Jasper mix)

Silicon Dioxide (SiO2) with iron oxide inclusions

Lemon Quartz

Silicon Dioxide (SiO2)

Citrine Quartz

Citrine (Silicon Dioxide, SiO2)

Yellow faceted gemstone, likely citrine or yellow beryl

Quartz (SiO₂), if citrine; beryl (Be₃Al₂Si₆O₁₈), if heliodor