Synthetic (Not A Natural Rock)

Shale with Vein Infillings

Shale (a fine-grained clastic sedimentary rock). The veins could be Calcite (CaCO3), Quartz (SiO2), or other minerals.

Ruby

Corundum (Al2O3 with Chromium)

Polished blue stone, likely sodalite or dyed agate

Most consistent with sodalite (Na₈(Al₆Si₆O₂₄)Cl₂), though the image cannot confirm composition

Opal-like cabochon ring stone

Likely common opal (hydrated amorphous silica, SiO₂·nH₂O); exact material uncertain from the photograph

Ruby (varieties of Corundum)

Aluminum oxide (Al2O3) with Chromium traces

Smoky Quartz

Silicon Dioxide (SiO2)

Smoky Quartz

Silicon Dioxide (SiO2)

Smoky Quartz

Smoky Quartz (Silicon Dioxide, SiO2)

Red-orange cabochon, likely carnelian or glass imitation

Carnelian: chalcedony (microcrystalline SiO₂), commonly iron-colored

Green beryl gemstone (likely emerald or green beryl)

Beryl, Be₃Al₂Si₆O₁₈; green color from chromium/vanadium or iron

Smoky Quartz

Silicon Dioxide (SiO2)

Diamond ring (likely diamond with gold band)

Diamond, crystalline carbon (C); band appears gold alloy

Cubic Zirconia (Simulated Diamond)

Cubic Zirconia (ZrO2)

Likely diamond accent

Diamond (crystalline carbon, C)

Blue gemstone, likely iolite or blue sapphire

Iolite (cordierite, Mg₂Al₄Si₅O₁₈) or corundum (sapphire, Al₂O₃)

Ruby

Corundum (Al2O3 with Chromium traces)

Emerald

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

Agate (Polished Sphere)

Silicon Dioxide (SiO2)

Man-made Green Quartz (Lab-grown or Treated)

Silicon Dioxide (SiO2) with artificial coloration

Smoky Quartz

Silicon Dioxide (SiO2)

Polished blue-black cabochon, likely blue obsidian or dyed glass-like stone

Indeterminate from image; possible natural obsidian (volcanic glass), commonly SiO₂-rich rhyolitic glass

Pearl and Garnet Glass

Calcium Carbonate (CaCO3) for pearl; Silicon Dioxide (SiO2) for glass

Blue glassy mineral specimen, possibly dyed or synthetic

Uncertain; possible blue fluorite (CaF₂), dyed chalcedony, or man-made glass

Polished ruby cabochon (likely synthetic or treated)

Corundum, aluminum oxide (Al₂O₃), colored red by chromium

Bismuth

Bismuth (Bi)

Quartz-rich pegmatite with drusy quartz

Quartz (SiO₂) in a granitic pegmatite, likely with feldspar and mica inclusions

Turquoise cabochon or turquoise-bearing material

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

Strawberry Quartz (or Sunstone / Tumbled Quartz)

Silicon Dioxide (SiO2) with Hematite/Lepidocrocite inclusions

Ruby

Corundum (Aluminum Oxide with Chromium), Al2O3:Cr

Clear quartz crystal sphere

Quartz (silicon dioxide, SiO₂)

Amethyst ring

Amethyst, purple quartz (SiO₂), likely set with diamond or other accent stones

Amethyst (Tumbled/Weathered Quartz)

Amethyst (SiO2 with iron impurities)

Tumbled green beryl or glassy green gemstone

Likely beryl, Be₃Al₂Si₆O₁₈; possibly treated emerald or synthetic glass

Strawberry Quartz (or Rose Quartz / Cherry Quartz)

Silicon Dioxide (SiO2) with Lepidocrocite, Hematite, or Goethite inclusions

Silicon Carbide (Carborundum)

Silicon Carbide (SiC)

Synthetic Blue Aura Quartz

Silicon Dioxide (SiO2) with Metallic Infusion

Strawberry Quartz and Rose Quartz

Silicon Dioxide (SiO2) with inclusions

Biotite-bearing granite or gneiss

Felsic granitoid; chiefly quartz, feldspar, and biotite mica

Smoky Quartz

Silicon Dioxide (SiO2)

Basalt Arrowhead (worked stone)

Aphanitic mafic volcanic rock (Basalt)

Likely weathered pebble or mineral fragment

Indeterminate; possibly quartz-rich stone, iron-stained feldspar, or a small chert fragment

Polished honey-yellow quartz-like crystal

Quartz (SiO₂), possibly citrine or heat-treated amethyst