Synthetic (Not A Natural Rock)

Tumbled amethyst

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

Garden Quartz (Lodalite)

Silicon Dioxide with various mineral inclusions (SiO2)

Weathered iron-stained rock fragment

Uncertain from the image; likely an iron-oxide-stained, quartz- and feldspar-bearing rock

Blue gemstone ring, likely lapis lazuli

Lapis lazuli: lazurite-rich metamorphic rock, chiefly (Na,Ca)8(AlSiO4)6(S,SO)2, commonly with calcite and pyrite

Blue sapphire

Corundum, aluminum oxide (Al₂O₃), colored blue mainly by iron and titanium

Green glassy cabochon, likely dyed or synthetic material

Uncertain; possibly green obsidian, chrysoprase, or synthetic glass

Composite Turquoise or Reconstituted Turquoise with Copper inclusions

CuAl6(PO4)4(OH)8·4H2O (Turquoise) mixed with matrix and copper/bronze flakes

Dyed Agate

Agate (Cryptocrystalline Quartz), SiO2

Amethyst stud earrings

Amethyst, purple quartz (SiO₂)

Clear faceted gemstone in a gold-colored setting

Likely colorless quartz (rock crystal) or synthetic cubic zirconia; visual identification is inconclusive

Diamond (or Cut Gemstone / Cubic Zirconia)

Carbon (C)

Likely beach-worn glass and a pebble

The brown piece appears to be weathered glass (amorphous SiO₂-rich material); the pale piece is likely a small quartz-rich stone, possibly milky quartz.

Dyed Alum or Dyed Quartz (Ornamental Crystal)

Silicon Dioxide (SiO2) or Potassium Alum [KAl(SO4)2·12H2O]

Weathered, quartz-rich rock (possibly quartzite)

Quartzite, composed predominantly of quartz (SiO₂); identification is uncertain from the photo

Green faceted gemstone, likely emerald

Beryl, Be₃Al₂Si₆O₁₈, colored green by chromium and/or vanadium

Polished pink corundum (likely treated ruby)

Corundum, aluminum oxide (Al₂O₃); ruby when red-to-pink from chromium

Iridescent silicon carbide (carborundum) crystal

Synthetic silicon carbide (SiC), likely a moissanite/carborundum specimen

Dark blue oval gemstone ring, likely sapphire

Likely corundum (Al₂O₃); the image alone cannot confirm the stone or whether it is natural

Diamond (or Clear Quartz / Cubic Zirconia)

Carbon (C) or Silicon Dioxide (SiO2) / Cubic Zirconia (ZrO2)

Amethyst (Resin Carving/Orgonite)

Silicon Dioxide (SiO2) with iron impurities

Faceted golden beryl (likely heliodor)

Beryl, Be₃Al₂Si₆O₁₈; yellow color from iron impurities

Ruby / Red Corundum

Al2O3 (Aluminum Oxide with Chromium trace)

Dyed Agate

Chalcedony (SiO2)

Cubic Zirconia (Faceted)

Zirconium Dioxide (ZrO2)

Colorless Gemstone (possibly Diamond or Cubic Zirconia)

C (Diamond) or ZrO2 (Cubic Zirconia)

Faceted pale-green gemstone, likely prasiolite or green quartz

Quartz (SiO₂), likely prasiolite; identification is uncertain from the photograph

Red faceted gemstone jewelry setting

Likely synthetic ruby or red spinel centerpiece with colorless accent stones; exact identification requires gemological testing

Amethyst (faceted gemstone)

Quartz, silicon dioxide (SiO₂), purple variety colored mainly by iron-related defects

Smoky Quartz

Silicon Dioxide (SiO2)

Synthetic Sapphire and Ion-X Glass

Single-crystal Alumina (Al2O3) and Ion-strengthened Aluminosilicate Glass

Ametrine

Silicon Dioxide (SiO2) with iron impurities

Blue topaz-style pendant (stone identity uncertain)

Possibly blue topaz (Al₂SiO₄(F,OH)₂); the image cannot confirm whether the stone is natural or synthetic

Hematite bead bracelet

Hematite (iron(III) oxide, Fe₂O₃), likely polished magnetic hematite or hematite-coated beads

Small faceted gemstone, likely diamond

Diamond (crystalline carbon, C)

Cubic Zirconia (Faceted Gemstone)

Zirconium dioxide (ZrO2)

Corundum (Pink Sapphire / Ruby)

Al2O3 (Aluminum Oxide)

Gold bullion bars

Native gold (Au), likely cast or refined metal

Turquoise cabochon

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

Painted beach pebble

Unidentified natural pebble; underlying lithology cannot be determined from the image

River Stone (likely Mudstone or Siltstone)

Lutite (Clastic sedimentary rock composed of clay and silt-sized particles)

Faceted clear gemstone, likely quartz or glass imitation

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

Heart-shaped faceted gemstone pendant

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