Man Made Glass (Not A Natural Rock Or Mineral)

White quartz pebble

Quartz (SiO₂), likely milky quartz

Opalite

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

Asphalt Chunk (Bituminous Concrete)

Aggregated Bitumen / Artificial Breccia

Citrine Quartz

Citrine (Silicon Dioxide, SiO2)

Clear Quartz Sphere (Rock Crystal)

Silicon Dioxide (SiO2)

Mystic Topaz (Treated Quartz or Topaz)

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

Goldstone

Aventurine glass

Opalite

Synthetic Opalized Glass

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.)

Unidentified gray stone/concrete-like fragment

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

Goldstone

Avventurina (Man-made Glass with Copper inclusions)

Goldstone beads (likely brown goldstone)

Man-made copper-bearing glass; not a natural mineral. Often sold as “aventurine glass.”

Pink Quartz / Sea Glass

Silicon Dioxide (SiO2)

Synthetic Resin Charm (Seal Shape)

Polymer Resin with plastic glitter / Polyethylene terephthalate glitters

Blue Slag Glass

Man-made Silicon Dioxide (Amorphous)

Opalite

Synthetic Opalised Glass

Blue opalite glass (likely man-made)

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

Sandstone (with Liesegang rings or joints)

Clastic Sedimentary Rock (primarily Quartz with Iron Oxide cement)

Tumbled quartz pebble

Quartz, silicon dioxide (SiO₂), likely milky quartz

Man-made Polished Porcelain Tile (Artificial Geologic Lookalike)

Fused Silicate Ceramic with Alumina (Synthetic Kaolinite derivative)

Concrete Fragment

Hardened Portland Cement Composite

Opalite

Man-made opalescent glass (SiO2 + metal oxides)

Painted River Rock

Artificially Coated Sedimentary Rock

Green glass-like mineral specimen, likely fluorite

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

Aura Quartz (Titanium-coated Quartz)

Silicon Dioxide (SiO2) with metallic vapor coating

Goldstone (blue/black aventurine glass)

Man-made aventurine glass; silica glass containing metallic copper or other glittering inclusions

Opalite

Man-made Glass (Synthetic Opalized Glass)

Likely iron-rich slag or weathered ironstone fragment

Uncertain; possibly iron oxide–rich material (hematite/goethite) or industrial iron slag

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

Quartz, silicon dioxide (SiO₂)

Opalite

Synthetic Glass (Amorphized Silicon Dioxide)

Goldstone (Red)

Aventurine Glass (Cupriferous glass)

Diamond (or Simulant)

Carbon (C)

Titanium Aura Quartz

Titanium bonded Silicon Dioxide (SiO2 + Ti)

Granite with Cupules / Bedrock Mortars

Granite (felsic intrusive plutonic rock)

Aura Quartz (Titanium Quartz)

Titanium-coated Silicon Dioxide (SiO2 + Ti)

Opalite-style pendant (likely synthetic glass, not natural opal)

Opalescent glass; commonly sold as “opalite” (not a recognized mineral species)

Concrete / Anthropogenic Conglomerate

Man-made composite material (Portland cement, aggregate, and water)

Concrete

Anthropogenic Sedimentary Rock (Hydrated Calcium Silicate)

Slag

Metallurgical Slag

Strawberry Quartz

Silicon Dioxide (SiO2) with Hematite or Goethite inclusions

Concrete fragment with Aggregate

Anthropogenic Concrete with Calcarious and Siliceous Aggregate

Likely clear quartz pebble or glassy quartz fragment

Quartz (silicon dioxide, SiO₂)