Synthetic (Man Made Glass)

Not a rock, mineral, or geological specimen

Clear quartz crystal

Quartz (silicon dioxide, SiO₂)

Green iridescent glass cabochon or synthetic gemstone

Likely synthetic glass; possibly coated synthetic quartz or lab-created green gemstone

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

Silicon Dioxide (SiO2) with artificial coloration

Glass

Amorphous Silicon Dioxide (SiO2)

Diamond (or Diamond Simulant)

Carbon (C) or Cubic Zirconia (ZrO2)

Sea Glass (specifically Frosted White)

Amorphous Silica (substance: Sodium-calcium silicate glass)

Blue Goldstone

Aventurine Glass

Green Aventurine

SiO2 (Silicon Dioxide with Fuchsite inclusions)

Polished black pebble, likely basalt

Basalt, a fine-grained mafic volcanic rock composed mainly of plagioclase feldspar and pyroxene, commonly with olivine

Aventurine Quartz

Silicon Dioxide (SiO2) with Fuchsite inclusions

Small rounded mineral pebble, possibly quartz

Uncertain; likely microcrystalline or crystalline SiO₂ (quartz), potentially with iron-oxide staining

Polished milky quartz (likely quartz worry stone or wand)

Quartz, silicon dioxide (SiO₂)

White quartz pebble

Quartz (SiO₂), likely milky quartz

Cobalt Glass Slug (Cullet)

Man-made Silicate Glass with Cobalt Oxide (CoO)

Likely tumbled or cut quartz/chalcedony fragment

Silicon dioxide (SiO₂), probably microcrystalline quartz or quartz

Aura Quartz (Titanium/Rainbow Quartz)

SiO2 (Silicon Dioxide) with metallic coating

Slag Glass

SiO2 (Silicon Dioxide) with impurities

Green glass-like mineral specimen, likely fluorite

Fluorite (calcium fluoride, CaF₂), if natural; appearance may also indicate colored glass

Concrete Fragment

Artificial Conglomerate (Cement and Aggregate)

Diamond (or Simulant)

Carbon (C)

Milky quartz (rough quartz fragment)

Quartz, silicon dioxide (SiO₂)

Goldstone (Synthetic Aventurescence Glass)

Cuprous Aventurescent Glass (Silicon Dioxide with Copper inclusions)

Tumbled quartz pebble

Quartz, silicon dioxide (SiO₂), likely milky quartz

Cullet Glass (Slag Glass)

Amorphous Silicon Dioxide (Industrial byproduct)

Silicon Carbide (Carborundum)

Silicon Carbide (SiC) / Moissanite (natural)

Goldstone (Brown/Gold)

Aventurine Glass (Man-made glass with Copper inclusions)

Goldstone

Aventurine Glass (Man-made glass with copper inclusions)

White quartz pebble or chip

Quartz (silicon dioxide, SiO₂), possibly milky quartz

Unidentified translucent crystal/mineral fragment

Likely quartz (SiO₂), but visual identification is uncertain

Green Aventurine

Silicon Dioxide (Quartz with Fuchsite inclusions), SiO2

Slag

Anthropogenic glassy silicate

Blue faceted gemstone ring, likely synthetic sapphire or blue topaz

Uncertain from image; possible corundum (Al₂O₃) or topaz (Al₂SiO₄(F,OH)₂)

Blue faceted gemstone, likely synthetic sapphire or blue glass

Corundum (Al₂O₃) if sapphire; identity cannot be confirmed visually

Pink Quartz / Sea Glass

Silicon Dioxide (SiO2)

Polished black stone, likely black obsidian

Volcanic glass; predominantly rhyolitic silica glass (SiO₂-rich)

Slag Glass

Vitreous Silicate Residue

Tumbled clear quartz (rock crystal)

Quartz, silicon dioxide (SiO₂)

Yellow faceted gemstone, likely citrine or yellow sapphire

Uncertain; probable quartz (SiO₂) or corundum (Al₂O₃)

Clear quartz crystal (likely)

Quartz, silicon dioxide (SiO₂)

Clear quartz crystal (likely)

Quartz, silicon dioxide (SiO₂)

Faceted glass-like gemstone object

Likely synthetic glass or cubic zirconia; exact material cannot be confirmed from the image