Manufactured Glass (Simulant)

Jewelry Chain with Blue and Clear Gemstones (Likely Cubic Zirconia)

Cubic Zirconia (ZrO₂), Silver or White Gold/Platinum Alloy

Sapphire

Corundum (Al2O3)

Cubic Zirconia (CZ)

Zirconium dioxide (ZrO2)

Blue Obsidian

Obsidian

Likely smoky quartz cabochon ring

Quartz, silicon dioxide (SiO₂), brown variety colored by irradiation and trace aluminum

Faceted clear gemstone, likely glass imitation or cubic zirconia

Uncertain; possibilities include cubic zirconia (zirconium dioxide, ZrO₂), quartz (SiO₂), or lead glass

Rhinestone (or glass crystal)

Silicon dioxide (if glass) / Various

Clear Quartz (faceted) / Diamond Simulant

Silicon Dioxide (SiO2) / Cubic Zirconia (ZrO2)

Purple glassy pebble, possibly slag glass

Unidentified; likely man-made glass rather than a natural mineral

Faceted clear gemstone, likely quartz (rock crystal)

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

Colorless faceted gemstone, likely cubic zirconia

Cubic zirconia (synthetic ZrO₂), possibly glass or quartz

Goldstone (brown goldstone)

Man-made aventurine glass, typically copper-bearing silica glass

Opalite

Synthetic glass (SiO2 + impurities)

Sea Glass

Amorphous Silicon Dioxide (SiO2)

Pink Cubic Zirconia (CZ)

Zirconium Dioxide (ZrO2)

Moonstone cabochon ring

Adularia moonstone, potassium feldspar (orthoclase, KAlSi₃O₈), possibly imitation or another white translucent gemstone

Quartz

Silicon Dioxide (SiO2)

Cut diamond tennis-chain jewelry

Diamond, crystalline carbon (C), cubic crystal system

Yellow jasper or polished yellow chalcedony

Microcrystalline quartz, SiO₂, likely iron-stained jasper/chalcedony

Goldstone

Aventurine Glass (Man-made)

Flint or chert fragment

Microcrystalline quartz (SiO₂), likely flint/chert

Possible tumbled obsidian

Volcanic glass, primarily rhyolitic silica glass (SiO₂-rich)

Obsidian (Blue)

Volcanic Glass (SiO2)

Cut gemstone ring, likely diamond

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

Colorless faceted gemstone, likely a small diamond or imitation

Undetermined; diamond is carbon (C), but visual appearance alone cannot distinguish it from cubic zirconia or glass

Clear faceted gemstone, likely quartz (rock crystal)

Quartz, silicon dioxide (SiO₂); visual identification is uncertain because the stone is heavily faceted and photographed with flash

Polished opalite (likely man-made opalescent glass)

Opalite is a commercial name, not a mineral; typically opalescent glass, often soda-lime silicate glass

Opalite (likely imitation opal glass)

Man-made opalescent glass; not a natural mineral (often sold as opalite)

Opalite (Synthetic Moonstone/Opal)

Synthetic Silica Glass

Cut gemstone, likely diamond

Diamond (crystalline carbon, C)

Blue crystal pendant (likely blue glass or synthetic crystal)

Not identifiable from the image; possibly synthetic quartz or glass, rather than a natural mineral

Blue sapphire ring

Corundum (aluminum oxide, Al₂O₃), likely heat-treated sapphire

Green glassy stone, possibly aventurine or green jade

Unidentifiable from the image; possible quartz-rich aventurine (SiO₂) or jadeite/nephrite

Red gemstone ring, likely synthetic ruby or red spinel

Ruby: corundum (Al₂O₃); spinel: MgAl₂O₄; exact identity requires testing

Blue opalite glass (likely man-made)

Opalite glass; a silica-based amorphous glass, not natural opal

Dyed or synthetic turquoise-blue glass-like specimen

Likely man-made colored glass or resin; exact identification requires testing

Green glassy slag or manufactured glass bead

Noncrystalline silicate glass; likely industrial glass/slag, not a true mineral

Colorless faceted gemstone, likely cubic zirconia or diamond

Uncertain from image; cubic zirconia (ZrO₂) is a common diamond simulant, while diamond is crystalline carbon (C)

Man-made Jewelry (Metal and Glass/Plastic)

Synthetic Alloy and Amorphous Solid (SiO2/Polymer)

Polished black stone bead, possibly black obsidian

Likely obsidian (natural volcanic glass; composition chiefly silica-rich volcanic glass), but identification is uncertain from the image

Blue glassy cabochon, likely blue quartz or synthetic glass

Possibly dyed blue chalcedony/quartz (SiO₂); visual identification is inconclusive

Tumbled yellow-brown quartzite or jasper

Quartzite, predominantly microcrystalline quartz (SiO₂), possibly iron-stained jasper