Synthetic (Not A Rock Or Mineral)

Lapis Lazuli (Tumbled Specimen)

Lapis Lazuli (Aggregate rock containing Lazurite: (Na,Ca)8(AlSiO4)6(SO4,S,Cl)2)

Lapis Lazuli

Lazurite-dominant metamorphic rock, Na8[Al6Si6O24]n(S,Cl,SO4,OH)2

Raw ruby (corundum)

Ruby variety of corundum, aluminum oxide (Al₂O₃), colored chiefly by chromium

Bauxite

Bauxite (Al(OH)3, AlO(OH))

Bauxite

Aluminium ore (Hydrated aluminium oxides AlOx(OH)3-2x)

N/A (Non-Geological Specimen)

Amethyst quartz cluster

Quartz, SiO₂; purple variety amethyst

Diamond (or Cubic Zirconia)

Carbon (C) or Zirconium Dioxide (ZrO2)

Cubic Zirconia (CZ)

Zirconium dioxide (ZrO2)

Cobalt Glass Slug (Man-made Glass)

Amorphous Silica with Cobalt Oxide (SiO2 + CoO)

Decorative gemstone bracelet or jewelry

Unidentifiable from the blurred image; likely colored glass or synthetic stones, possibly mixed gemstone beads

Lapis Lazuli (Tumbled Stone)

Na6Ca2(Al6Si6O24)(SO4,S,Cl)2 (Lazulite-rich Metamorphic Rock)

Fossil tooth, likely shark tooth

Likely fossilized shark tooth (possibly a small lamniform shark; exact taxon cannot be confirmed from the image)

Opalite Egg

Synthetic Glass (Simulated Opal)

Opalite

Synthetic Silicon Dioxide (SiO2)

Ruby

Corundum (Al2O3)

Opalite

Synthetic glass / Opaque silicious glass

Possible weathered iron-rich rock or breccia

Indeterminate; likely iron-oxide-stained silicate rock, possibly basaltic breccia or limonite-bearing material

Goldstone

Aventurine Glass (Man-made)

Blue Sapphire (likely costume glass imitation)

Corundum (Al2O3) with iron/titanium impurities

Bauxite

Bauxite (Al(OH)3, AlO(OH))

Blue-green faceted gemstone, likely turquoise or treated turquoise

Turquoise: hydrated copper–aluminum phosphate, CuAl₆(PO₄)₄(OH)₈·4H₂O; exact identification is uncertain from the image

Turquoise

Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]

Lapis Lazuli

Lapis Lazuli (a rock composed primarily of Lazurite, Sodalite, Calcite, and Pyrite)

Bauxite

Bauxite (Mixture of Al(OH)3, AlO(OH), and Fe2O3)

Goldstone (Brown)

Aventurine glass

Red cabochon gemstone ring (likely glass or synthetic stone)

Undetermined; the image does not establish a natural mineral identity

Opalite crescent pendant

Opalite (man-made opalescent glass; not a natural mineral)

Goldstone (Red)

Aventurine Glass

Ruby / Red Corundum

Al2O3 (Aluminum Oxide with Chromium trace)

Quartzite (Engineered Stone)

Silicon Dioxide (SiO2) based synthetic composite

Pegmatitic granite

Granite/pegmatite; predominantly quartz (SiO₂), feldspar, and mica

Vesicular basalt (scoria-like volcanic rock)

Vesicular basalt; predominantly plagioclase, pyroxene, and volcanic glass, with possible iron oxides

Man-made Jewelry (Metal and Glass/Plastic)

Synthetic Alloy and Amorphous Solid (SiO2/Polymer)

Dark fine-grained rock, likely basalt

Basalt; chiefly plagioclase feldspar and pyroxene, commonly with olivine and iron oxides

Costume Jewelry with Synthetic Gemstones

Synthetic Cubic Zirconia and Glass (SiO2 / ZrO2)

Blue glass-like gemstone specimen (likely dyed or synthetic quartz)

Uncertain; possibly blue-dyed quartz or synthetic glass, not confidently identifiable from the image

Tumbled banded sandstone pebble

Quartz-rich sandstone (lithified siliciclastic sediment)

Opalite

Synthetic Opalized Glass / Man-made Glass

Small clear crystal, possibly quartz or glass-like gemstone

Uncertain; likely quartz (SiO₂), but the image is insufficient to exclude man-made glass or cubic zirconia

Weathered mafic metamorphic rock, likely amphibolite or hornblende gneiss

Amphibolite; primarily hornblende amphibole and plagioclase feldspar, with possible biotite, quartz, and iron oxides

Cubic Zirconia

Cubic Zirconium Dioxide (ZrO2)