Gemstone

Prehnite

Prehnite (Ca2Al(AlSi3O10)(OH)2)

Amazonite

Microcline (KAlSi3O8) with lead impurities

Citrine

Crystalline Quartz (SiO2) with iron impurities

Citrine

Silicon Dioxide (SiO2)

Amethyst

SiO2 (Silicon Dioxide with Iron impurities)

Amethyst

Silicon Dioxide (SiO2) with trace Iron (Fe)

Smoky Quartz

Silicon Dioxide (SiO2)

Emerald

Beryl (Be3Al2(SiO3)6) with chromium/vanadium impurities

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Fire Agate

Silicon Dioxide (SiO2) with Goethite or Limonite inclusions

Sunstone

Oligoclase (Plagioclase Feldspar) - (Ca,Na)(Al,Si)4O8 with Hematite or Copper inclusions

Black Sapphire

Corundum (Al2O3)

Amethyst

Silicon Dioxide (SiO2)

Feldspar (specifically Orthoclase)

Potassium Aluminum Silicate (KAlSi3O8)

Pearl (with Peridot)

Calcium carbonate (CaCO3) + Conchiolin; Peridot: Magnesium iron silicate (Mg, Fe)2SiO4

Smoky Quartz

Silicon Dioxide (SiO2)

Amethyst

Amethyst (Silicon Dioxide - SiO2 with iron impurities)

Red bead-and-chain costume jewelry, likely glass or plastic

No geological identification; the red beads appear manufactured and cannot be identified as mineral from the image

Colorless faceted gemstone, likely glass or cubic zirconia

Uncertain; possible cubic zirconia (zirconium dioxide, ZrO₂) or synthetic glass

Polished pebble, likely basalt or altered volcanic rock

Fine-grained mafic volcanic rock; exact identification requires testing

Agate and Chalcedony Beads

Cryptocrystalline Quartz (SiO2)

Green Chalcedony (Batu Akik)

Silicon Dioxide (SiO2)

Emerald in Matrix

Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities

Sunstone

Plagioclase Feldspar (Na,Ca)(Al,Si)4O8

Corundum (Sapphire / Raw Sapphire)

Aluminum Oxide (Al2O3)

Jasper

Silicon dioxide (SiO2) with iron inclusions

Charoite

(K,Sr,Ba,Na)15-16(Ca,Na)32[Si6O11(O,OH)2]2[Si12O18(O,OH)6]2[Si17O25(O,OH)18]2(OH,F)4 · nH2O

Gold ring with a clear faceted gemstone

Likely diamond (carbon, C); the photograph is insufficient to confirm the stone or metal

Blue-stone and diamond ring

Blue stone is possibly blue sapphire (corundum, Al₂O₃); surrounding stones appear to be diamonds (carbon, C).

Emerald

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

Amethyst jewelry centerpiece

Amethyst, purple quartz (SiO₂), likely set with colorless diamonds or other gems

Turquoise (possible Dyed Magnesite/Howlite)

CuAl6(PO4)4(OH)8·4H2O

Polished lapis lazuli crescent

Lapis lazuli; primarily lazurite, (Na,Ca)₈(AlSiO₄)₆(S,SO)₄, with calcite and pyrite

White cabochon gemstone, likely milky chalcedony or opalite

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

Green cabochon gemstone pendant

Indeterminate; likely dyed green turquoise, chrysoprase, or opaque beryl set with blue/clear accent stones

Garnet ring

Likely almandine or pyrope garnet, an Fe–Mg–Al silicate in the garnet group; exact identity cannot be confirmed visually

Faceted black gemstone, likely black spinel

Spinel (MgAl₂O₄); identification from the image is uncertain

Polished blue gemstone bead bracelet, likely aquamarine

Aquamarine, blue variety of beryl (Be₃Al₂Si₆O₁₈); identification from the image is uncertain

Red faceted gemstone, likely synthetic ruby or red spinel

Ruby: corundum (Al₂O₃); spinel: MgAl₂O₄; visual identification alone is insufficient

Yellow faceted gemstone, likely citrine

Citrine (yellow quartz, SiO₂); identification from the image is tentative

Amethyst

Quartz (Silicon Dioxide, SiO2 with iron impurities)

Turquoise (likely stabilized or simulated Howlite)

CuAl6(PO4)4(OH)8·4H2O (Hydrous phosphate of copper and aluminium)