Man Made Glass (Not A Natural Rock Or Mineral)

Costume Jewelry with Synthetic Gemstones

Synthetic Cubic Zirconia and Glass (SiO2 / ZrO2)

Opalite

Synthetic Glass (Simulated Opal)

Opalite (Synthetic Moonstone/Opal)

Synthetic Silica Glass

Polished blue glassy mineral specimen, likely sodalite or blue aventurine

Most consistent with sodalite (Na₈Al₆Si₆O₂₄Cl₂), though dyed quartzite or blue glass cannot be excluded from the photograph

Sea Glass

Man-made silicate glass

Blue goldstone beads

Man-made aventurine glass (silica glass with metallic copper inclusions), not natural lapis lazuli

Faceted glass-like gemstone (likely synthetic quartz or cubic zirconia)

Identification uncertain; possibilities include synthetic quartz (SiO₂) or cubic zirconia (ZrO₂)

Colorless quartz crystal (likely quartz fragment)

Quartz, silicon dioxide (SiO₂)

White pebble, likely quartz or calcite

Indeterminate from image; possible microcrystalline quartz (SiO₂) or calcite (CaCO₃)

Blue Goldstone

Goldstone (artificial glass)

Possible obsidian or slag glass

Volcanic glass, primarily SiO₂; alternatively industrial iron-rich glassy slag

Aura Quartz (Titanium/Rainbow Quartz)

SiO2 (Silicon Dioxide) with metallic coating

Opalite

Man-made glass (traditionally simulated Opal)

Opalite

Synthetic Opalized Glass (SiO2 + additives)

Concrete / Conglomerate (Man-made)

Artificial Conglomerate (Cementitious Composite)

Opalite crescent pendant

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

Cubic Zirconia (Jewelry Setting)

Zirconium Dioxide (ZrO2)

Cullet Glass (Slag Glass)

Amorphous Silicon Dioxide (Industrial Byproduct)

Opalite

Synthetic Glass (Simulated Opal)

Opalite

Synthetic Glass (typically Silica/Magnesium based with metal additives)

Beads (likely glass or man-made material)

N/A (artificial material)

Opalite

Opalescent Glass (SiO2 + coloring agents)

Polished black pebble, likely basalt

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

Not a geological specimen

N/A (man-made object)

Unidentified gray stone/concrete-like fragment

Indeterminate; likely a fine-grained carbonate or cementitious geological fragment

Cullet Glass (Slag)

Amorphous Silicon Dioxide (Man-made)

Asphalt (Bituminous Pavement)

Bituminous mix (Aggregates with Bitumen binder)

Tumbled white chalcedony (likely milky quartz)

Chalcedony, microcrystalline quartz (SiO₂)

Conglomerate

Conglomerate (clastic sedimentary rock)

Tumbled milky quartz pebble

Quartz (silicon dioxide, SiO₂), opaque-to-translucent milky variety

Opalite

Synthetic Opalite Glass (Silicon Dioxide)

Aventurine Quartz

Silicon Dioxide (SiO2) with Fuchsite inclusions

Silicon Carbide (Carborundum)

Silicon Carbide (SiC) / Moissanite (natural)

Blue Obsidian

Volcanic Glass (SiO2 with inclusions)

Diamond

Native Carbon (C)

Cullet (Slag Glass)

Amorphous Silica (SiO2) with various metal oxide colorants

Asphalt Chunk (Bituminous Concrete)

Aggregated Bitumen / Artificial Breccia

Opalite

Man-made Synthetic Glass (Silicon Dioxide with metal additives)

Mystic Topaz (Treated Quartz or Topaz)

Aluminum silicate fluoride hydroxide [Al2SiO4(F,OH)2] with thin-film metallic coating

Chakra Stone (Composite / Man-made Bonded Gemstones)

Composite of Quartz, Lapis Lazuli, Aventurine, Tiger's Eye, and Jasper (SiO2, (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, etc.)

Goldstone (aventurine glass)

Man-made copper-bearing glass; not a natural mineral (commonly sold as blue/brown goldstone)

Citrine Quartz

Citrine (Silicon Dioxide, SiO2)