Man Made (Synthetic Rock)

Sea Glass

Man-made silicate glass (Amorphous silicon dioxide)

Goldstone

Aventurine Glass (Man-made glass with copper inclusions)

Polished labradorite sphere

Labradorite, calcic plagioclase feldspar ((Ca,Na)(Al,Si)₄O₈)

Polished labradorite pendant

Labradorite, a calcium-rich plagioclase feldspar (approximately NaAlSi₃O₈–CaAl₂Si₂O₈)

Citrine Quartz

Citrine (Silicon Dioxide, SiO2)

Labradorite

Labradorite ((Ca, Na)(Al, Si)4O8)

Silicon Carbide (Carborundum)

Silicon Carbide (SiC)

Red Sandstone or Brick Fragment

Arenite (if sandstone)

Cherry Quartz

SiO2 (Silicon Dioxide with iron-rich inclusions/dye)

Likely clear quartz pebble or glassy quartz fragment

Quartz (silicon dioxide, SiO₂)

Aventurine Quartz

Silicon Dioxide (SiO2) with Fuchsite inclusions

Strawberry Quartz

Silicon Dioxide (SiO2) with Hematite or Goethite inclusions

Green Slag

Anthropogenic Silicate Glass

Bismuth

Bismuth (Bi)

White cabochon gemstone, likely milky chalcedony or opalite

Chalcedony: microcrystalline quartz, SiO₂; appearance may also indicate synthetic opalite glass

Slag Glass

Anthropogenic Amorphous Silicon Dioxide

Rainbow Hematite (Titanium Coated)

Iron(III) oxide (Fe2O3) with Titanium/Metal Oxide coating

Blue opalite glass (likely man-made)

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

Tumbled opalite (likely man-made glass)

Opalite, a trade name for opalescent glass; not natural opal

Opalite (likely imitation opal glass)

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

Milky quartz (rough quartz fragment)

Quartz, silicon dioxide (SiO₂)

Synthetic Convention Badge (Plastic/PVC)

Polyvinyl Chloride (PVC) / Polycarbonate

Polished brown jasper (likely brecciated or orbicular jasper)

Microcrystalline quartz/chalcedony, SiO₂, with iron-oxide and other mineral inclusions

Likely tumbled or cut quartz/chalcedony fragment

Silicon dioxide (SiO₂), probably microcrystalline quartz or quartz

Diamond ring

Diamond, crystalline carbon (C), set in a gold-colored metal ring

Tumbled milky quartz pebble

Quartz (silicon dioxide, SiO₂), likely milky quartz

Synthetic Blue Aura Quartz

Silicon Dioxide (SiO2) with Metallic Infusion

Carved labradorite fish

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

Mystic Topaz

Aluminum Silicate Fluoride Hydroxide (Al2SiO4(F,OH)2) with metallic film coating

Obsidian (Blue)

Volcanic Glass (SiO2)

Pink Quartz / Sea Glass

Silicon Dioxide (SiO2)

Clear quartz crystal (likely)

Quartz, silicon dioxide (SiO₂)

Bismuth crystal

Bismuth (Bi), synthetic laboratory-grown crystal

Man-made Metal Pin (Non-geological)

Antimony-Lead Alloy or Zinc/Brass Base with Electroplating

Diamond / Clear Quartz / Glass paste

Carbon (Diamond) / Silicon Dioxide (Quartz)

Diamond (or Cubic Zirconia)

Carbon (C) or Zirconium Dioxide (ZrO2)

Faceted Gemstone

Unknown transparent mineral, possibly Diamond (C), Cubic Zirconia (ZrO2), Quartz (SiO2), or Glass

Silicon Carbide (Carborundum)

Silicon Carbide, SiC

Clear quartz crystal (likely)

Quartz, silicon dioxide (SiO₂)

Yellow faceted gemstone, likely citrine or synthetic glass

Citrine (quartz, SiO₂) is the leading natural possibility; visual identification is uncertain from the photograph

Quartz (likely milky quartz or quartz glass-like fragment)

Quartz, silicon dioxide (SiO₂)

Strawberry Quartz

Silicon Dioxide (SiO2) with Hematite/Goethite inclusions