Synthetic (Man Made Glass)

Blue glassy mineral specimen, possibly blue topaz or aquamarine

Tentatively topaz (Al₂SiO₄(F,OH)₂) or beryl/aquamarine (Be₃Al₂Si₆O₁₈); identification is limited by severe image blur

Green cabochon gemstone pendant, likely turquoise or dyed green turquoise

Probably turquoise, CuAl₆(PO₄)₄(OH)₈·4H₂O; exact identification requires testing

Milky quartz (rough fragment)

Quartz, silicon dioxide (SiO₂)

Smoky Quartz

Silicon Dioxide (SiO2)

Ruby (Rough/Raw)

Corundum (Al2O3:Cr)

Green cabochon gemstone, likely glass-filled or synthetic emerald imitation

Uncertain; possible synthetic emerald (beryl, Be₃Al₂Si₆O₁₈) or green glass

Orange tumbled feldspar, likely sunstone

Probably potassium feldspar (orthoclase or microcline); identification is uncertain from the image

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

Calcium Fluoride (CaF2)

Assorted gemstone jewelry

Mixed natural and synthetic gemstone cabochons and faceted stones; individual species cannot be determined reliably from this image

Pumice

Pumice (Vesicular volcanic glass)

Dark blue polished stone pendant

Indeterminate; possibly sodalite, lapis lazuli, or blue slag/glass-like material

Fluorite

Calcium Fluoride (CaF2)

Blue stone cabochon, likely lapis lazuli or dyed stone

Lapis lazuli: lazurite-rich rock, chiefly (Na,Ca)₈(AlSiO₄)₆(S,SO)₂; exact identification is uncertain from the image

Obsidian

Volcanic Glass (70% or more SiO2)

Smoky Quartz

Silicon Dioxide (SiO2)

Smoky Quartz

Silicon Dioxide (SiO2)

Flint (gray chert)

Microcrystalline quartz (SiO₂), a variety of chert

Small faceted gemstone, likely diamond

Diamond (crystalline carbon, C)

Sea Glass

Amorphous Silica (Glass) SiO2

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

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

Flint (chert) fragment

Microcrystalline quartz (SiO₂), commonly called flint when dark

Sapphire (Blue)

Corundum (Al2O3)

Ruby (Raw Corundum)

Al2O3 (Aluminum Oxide)

Diamond (or Diamond Simulant)

Carbon (C) if diamond, various if simulant

Cubic Zirconia

Zirconium Dioxide (ZrO2)

Smoky Quartz

Silicon Dioxide (SiO2)

Chert (specifically Tan/Gray Chert)

Microcrystalline quartz (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)

Blue Sea Glass

Amorphous Silica (Anthropogenic glass)

Gem-set gold ring

Gold alloy setting with a colorless faceted gemstone, possibly quartz or glass; the stone cannot be identified reliably from the image

Amethyst ring

Amethyst, purple quartz (SiO₂)

Pumice

Pumice (Vitreous volcanic rock)

Colorless faceted gemstone, likely cubic zirconia

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

Amethyst ring

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

Cubic Zirconia and Synthetic Ruby Jewelry

Cubic Zirconia (ZrO2) and Synthetic Corundum (Al2O3)

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.

Fired Clay Brick (Anthropic Rock substitute)

Anthropogenic polycrystalline ceramic (predominantly Mullite and Quartz: Al6Si2O13 + 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

Gold and Cubic Zirconia (San Judas Tadeo Pendant)

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