Man Made Object (Simulant)

Faceted clear gemstone, likely quartz (rock crystal)

Quartz, silicon dioxide (SiO₂); exact identity is uncertain because the strong flash and cut obscure diagnostic features

Diamond (or Cubic Zirconia simulant)

Carbon (C) / Zirconium Dioxide (ZrO2)

Ruby (Faceted)

Corundum (Al2O3:Cr)

Emerald and diamond ring

Emerald: beryl, Be3Al2Si6O18, colored green by chromium and/or vanadium; surrounding stones appear to be diamonds, crystalline carbon (C)

Cullet Glass (Man-made Glass Slag)

Amorphous Silica (SiO2) with chemical additives

N/A (Non-Geological Object)

Diamond (or Diamond Simulant)

Native Carbon (C)

Diamond (or synthetic simulant)

Cubic C (Carbon)

Granodiorite

Granodiorite

Oval faceted gemstone ring, likely diamond

Diamond (crystalline carbon, C), possibly a diamond simulant; identification requires testing

Faceted colorless gemstone, likely glass or diamond imitation

Unidentified; possibly diamond (carbon, C) or cubic zirconia (zirconium dioxide, ZrO₂)

Diamond (or Cubic Zirconia)

Crystallized Carbon (C) for Diamond; Zirconium Dioxide (ZrO2) for CZ

Goldstone (likely blue-free synthetic goldstone pendant)

Synthetic aventurine glass; silica glass with dispersed metallic copper crystals

Cobalt Glass Slug (Man-made Glass)

Amorphous Silica with Cobalt Oxide (SiO2 + CoO)

Likely fossilized coral with polished blue calcite or aragonite specimen

Fossil coral, commonly Scleractinia; blue material likely dyed or treated calcite/aragonite

Faceted citrine-colored gemstone

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

Diamond engagement ring

Diamond, crystalline carbon (C)

Diamond ring

Diamond, crystalline carbon (C), set in a likely precious-metal ring

Jasper / Chert (Red)

Cryptocrystalline quartz (SiO2)

Blue Howlite (Dyed)

Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5)

Serpentine

Serpentine group, including Antigorite, Lizardite, and Chrysotile (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4

Greenstone / Serpentinite

Serpentinite (complex of Mg, Fe, Ni, Al, Zn, Mn silicate minerals including Antigorite, Lizardite, and Chrysotile)

Colorless faceted gemstone, likely cubic zirconia

Synthetic cubic zirconia (zirconium dioxide, ZrO₂); identity is visual and not definitive

Serpentinite

Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4

Chert or silicified sedimentary fragment (tentative)

Microcrystalline quartz (SiO₂), possibly silicified limestone or fossil-bearing chert

Goldstone (Red/Brown)

Aventurine Glass (SiO2 with Copper inclusions)

Red glassy cabochon, likely synthetic ruby or red glass

Uncertain; possible synthetic corundum (Al₂O₃, chromium-colored) or man-made glass

Tumbled opalite (likely synthetic glass)

Opalite; typically man-made opalescent soda-lime glass, not a recognized mineral species

Tumbled brown chalcedony or jasper

Microcrystalline quartz, SiO₂; possibly iron-bearing jasper

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Polished dendritic agate cabochon (likely agate or jasper)

Microcrystalline quartz, SiO₂, commonly chalcedony with iron-oxide inclusions

Clear Quartz (faceted) / Diamond Simulant

Silicon Dioxide (SiO2) / Cubic Zirconia (ZrO2)

Mixed small mineral specimens, likely quartz varieties

Uncertain from the image; translucent pieces may be quartz (SiO₂), while golden-brown pieces could be iron-stained quartz or calcite

Cut diamond tennis-chain jewelry

Diamond, crystalline carbon (C), cubic crystal system

US Penny

Cuprum (Copper: Cu) and Zincum (Zinc: Zn) Alloy

Brick

Fired clay or Ceramic material (no specific mineralogical scientific name as it's a composite)

Dark quartz point (possibly smoky quartz)

Quartz, SiO₂; the dark color may indicate smoky quartz, but the image is insufficient to confirm

Serpentine (Greenstone)

Antigorite, Lizardite, and Chrysolite mixture (Mg3Si2O5(OH)4)

Unidentifiable blurred specimen

Cannot be determined from the image

Carnelian cabochon

Orange-red variety of chalcedony (microcrystalline quartz), SiO₂

Mammoth Tooth

Mammuthus primigenius (Tooth fragment)

Polished orbicular jasper (likely ocean jasper)

Siliceous microcrystalline quartz/chalcedony with iron-oxide and volcanic inclusions; commonly called ocean jasper