Manufactured Glass (Simulant)

Goldstone

Aventurine Glass (Man-made glass with copper inclusions)

Opalite

Synthetic glass / Opalized glass

Opalite crescent pendant

Opalite (man-made opalescent glass; not a natural mineral)

Goldstone (aventurine glass)

Synthetic copper-bearing soda-lime glass; commonly sold as red goldstone

Opalite (Synthetic Opalized Glass)

Synthetic Silicon Dioxide (SiO2) glass

Tumbled opalite (likely synthetic glass)

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

Opalite

Synthetic glass (SiO2 + metal additions)

Zirconia (Ceramic) & Ion-X Glass

Zirconium Dioxide (ZrO2) and Ion-strengthened Aluminosilicate Glass

Tumbled opalite (likely man-made glass)

Opalite glass; a synthetic opalescent glass, not a natural mineral species

Likely flint/chert fragments

Microcrystalline quartz (SiO₂), possibly fossil-bearing chert

Polished black gemstone, likely obsidian

Volcanic glass; primarily silica-rich rhyolitic composition (approximately SiO₂)

Green calcite (likely)

Calcite, CaCO₃

White Quartz Star-cut crystal

Silicon Dioxide (SiO2)

Agate and millefiori glass jewelry

Agate: microcrystalline quartz (SiO₂); millefiori element appears to be man-made glass

Man-made Crystal (Lead Glass)

Lead oxide-doped Silica Glass (approx. SiO2 + PbO)

Polished dark stone, possibly obsidian

Unidentified polished specimen; possibly volcanic glass (obsidian, silica-rich natural glass)

Clear quartz crystal (likely quartz fragment)

Quartz, silicon dioxide (SiO₂)

Faceted colorless gemstone, likely quartz or glass imitation

Most plausibly rock crystal (quartz, SiO₂); identity is uncertain because the photograph shows only intense facet reflections

Polished black stone, likely basalt or dark river pebble

Basalt; chiefly plagioclase feldspar and pyroxene, commonly with minor magnetite

Slag Glass (Cullet)

Amorphous Silica (man-made), primarily SiO2 with trace metal oxides

Faceted blue gemstone ring, likely synthetic spinel or glass; identity uncertain

Possibly synthetic blue spinel (MgAl₂O₄) or laboratory sapphire (Al₂O₃); the clear side stones may be cubic zirconia or glass

Colorless faceted gemstone, likely quartz (rock crystal)

Quartz, silicon dioxide (SiO₂); exact identification cannot be confirmed from the photograph

Orange glassy slag (industrial by-product)

Iron-rich silicate glass; composition varies, commonly Fe–Ca–Al silicate

Clear quartz pebble or glass-like quartz specimen

Quartz (silicon dioxide, SiO₂)

Beads (likely glass or man-made material)

N/A (artificial material)

Blue glass-like gemstone specimen (likely dyed or synthetic quartz)

Uncertain; possibly blue-dyed quartz or synthetic glass, not confidently identifiable from the image

Likely tektite (impact glass), possibly Muong Nong-type indochinite

Natural impact glass; silica-rich glass, typically ~70–80% SiO₂

Black tumbled stone, possibly obsidian

Obsidian (volcanic glass; predominantly SiO₂), identification uncertain from image

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

Opalite

Man-made opalescent glass (SiO2 + metal oxides)

Polished black stone, likely black obsidian

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

Blue glassy fragment among beach gravel

Likely cobalt-blue man-made glass; not a natural mineral specimen

Polished black stone, likely hematite

Hematite (Fe₂O₃), possibly magnetite or a hematite-rich ironstone

Opalite

Synthetic Fluorescent Glass (SiO2 + impurities)

Colorless faceted gemstone, likely cubic zirconia

Cubic zirconia (synthetic ZrO₂), possibly glass or white sapphire

Opalite

Man-made Glass (Synthetic Opalized Glass)

Blue-dyed tumbled quartz or glass imitation

Quartz (SiO₂), appearance possibly enhanced with blue dye; identity uncertain from image

Blue opalite glass cabochon (likely imitation opal)

Man-made opalescent glass; not a natural mineral

Opalite

Synthetic Opalised Glass

Tumbled brown-and-black stone, likely mahogany obsidian

Volcanic glass; predominantly rhyolitic obsidian, SiO₂-rich

Polished black stone, possibly basalt or black jasper

Basalt (fine-grained mafic rock) or microcrystalline quartz if jasper

Black polished stone, likely black obsidian

Obsidian; volcanic glass, predominantly silica-rich rhyolitic composition