Synthetic (Man Made Glass)

Amethyst ring

Amethyst, purple quartz (SiO₂)

Sapphire

Corundum (Al2O3)

Pumice

Pumice (Vitreous volcanic rock)

Green Fluorite (likely synthetic or heat-treated for jewelry)

Calcium Fluoride (CaF2)

Fired Clay Brick (Anthropic Rock substitute)

Anthropogenic polycrystalline ceramic (predominantly Mullite and Quartz: Al6Si2O13 + SiO2)

Polished labradorite cabochon

Labradorite, calcium-rich plagioclase feldspar; approximately (Ca,Na)(Al,Si)₄O₈

Emerald

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

Agate (Polished Sphere)

Silicon Dioxide (SiO2)

Black onyx or black spinel ring stone

Likely chalcedony (SiO₂), variety black onyx; possibly synthetic spinel or glass

Faceted colorless gemstone, likely quartz or glass imitation

Most likely quartz (SiO₂), though the strong glare and visible facet pattern could indicate cubic zirconia or lead glass

Blue gemstone, likely iolite or blue sapphire

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

Amethyst ring

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

Silicon Carbide (Carborundum)

Silicon Carbide, SiC

Amber (and Cubic Zirconia)

Fossilized Tree Resin

Faceted citrine-colored gemstone

Likely citrine (quartz, SiO₂); possibly yellow glass or synthetic gem

Strawberry Quartz (Lepidocrosite/Hematite-Included Quartz)

Quartz (Silicon Dioxide) with Lepidocrosite or Hematite inclusions (SiO2 + Fe2O3 · nH2O)

Silicon

Element Si

Sea Glass

Amorphous Silica (Glass) SiO2

Cut gemstone ring, likely diamond

Diamond (carbon, C), faceted gemstone; exact stone identification is uncertain from the image

Colorless faceted gemstone, likely cubic zirconia

Synthetic cubic zirconia (ZrO₂), tentative; possibly diamond or synthetic moissanite

Blue Goldstone

Aventurine Glass (SiO2 with Co and metallic inclusions)

Chert (specifically Tan/Gray Chert)

Microcrystalline quartz (SiO2)

Smoky Quartz

Silicon Dioxide (SiO2)

Goldstone and pink quartz bead strands

Goldstone is aventurescent copper-bearing glass; pink beads are likely rose quartz (SiO₂), though dyed or glass imitations are possible

Moonstone cabochon (probable)

Adularescent feldspar, usually orthoclase–albite intergrowth (KAlSi3O8–NaAlSi3O8)

Smoky Quartz

Silicon Dioxide (SiO2)

Native Silver

Silver (elemental Ag)

Blue Sea Glass

Amorphous Silica (Anthropogenic glass)

Blue Topaz

Topaz [Al2SiO4(F,OH)2]

Diamond (or Diamond Simulant)

C (Carbon) or synthetic equivalent

Clear faceted gemstone, likely quartz (rock crystal)

Quartz, silicon dioxide (SiO₂); exact identity cannot be confirmed from the glare-heavy image

Tumbled amethyst

Amethyst, purple quartz (SiO₂)

Nickel coin (U.S. currency)

Cupronickel (75% Copper, 25% Nickel alloy)

Faceted glass-like gemstone (likely synthetic quartz or cubic zirconia)

Identification uncertain; possibilities include synthetic quartz (SiO₂) or cubic zirconia (ZrO₂)

Beach Pebble Quartzite / Chalcedony Pebble

Silicon Dioxide (SiO2)

Smoky Quartz

Smoky Quartz (Silicon Dioxide - SiO2)

Smoky Quartz

Silicon Dioxide (SiO2) with aluminum impurities and natural radiation

Gold and Cubic Zirconia (San Judas Tadeo Pendant)

Native Gold (Au) with Synthetic Cubic Zirconia (ZrO2)

Pink tourmaline (rubellite)

Elbaite tourmaline, lithium sodium aluminum borosilicate: Na(Li1.5Al1.5)Al6(BO3)3Si6O18(OH)4

Labradorite cabochon

Labradorite, a calcium-rich plagioclase feldspar; approximately (Ca,Na)(Al,Si)₄O₈

Chert (Flint/Jasper variety)

Microcrystalline Quartz (SiO2)

Colorless faceted gemstone, likely cubic zirconia

Cubic zirconia (synthetic zirconium dioxide, ZrO₂); possibly colorless quartz or laboratory diamond