Mineral (Man Made Glass)

Blue Goldstone

Man-made glass with suspended copper, cobalt, or manganese particles

Asphalt Concrete (Bituminous Concrete)

Bituminous aggregate

Red-orange jasper pebble (tentative)

Microcrystalline quartz, SiO₂, colored mainly by iron oxides

Concrete Fragment

Hardened Portland Cement Composite

Bismuth Crystal

Bismuth (Bi)

Aura Rose Quartz

SiO2 (Silicon Dioxide with Titanium/Gold coating)

Blue Goldstone

Aventurine Glass

Crackle Agate / Dyed Quartz

SiO2 (Silicon Dioxide)

Opalite

Synthetic Glass (Simulated Moonstone/Opal)

Opalite

Synthetic Glass, SiO2 base with metallic inclusions

Dyed Imperial Jasper (Sea Sediment Jasper)

Silicon Dioxide (SiO2) - Impure Quartz/Chalcedony

Green Aventurine

Quartzite with Fuchsite inclusions (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)

Sandstone Concretion

Clastic Sedimentary Concretion (SiO2 with Iron Oxide)

Carborundum (Silicon Carbide)

Silicon Carbide (SiC)

Fossiliferous limestone with colonial coral

Calcite (CaCO₃) limestone containing fossil tabulate or rugose coral colonies

Goldstone (aventurine glass)

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

Aura Quartz (Pink/Rose Aura Quartz)

Silicon Dioxide (SiO2) bonded with Platinum and/or Silver

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.)

Polished white chalcedony or quartz pendant

Microcrystalline quartz (chalcedony), SiO₂; exact identification is uncertain from the image

Blue Sapphire (Synthetic or Man-made Glass Imitation)

Corundum (Al2O3) if natural; Lead-glass or Spinal if synthetic

Blue Apatite

Apatite (Calcium Phosphate) - Ca5(PO4)3(F,Cl,OH)

Mohave Turquoise (Composite/Stabilized)

Hydrated copper aluminium phosphate (CuAl6(PO4)4(OH)8·4H2O) with stabilizing resin and metallic inclusions

Cullet Glass (sometimes mistaken for Blue Obsidian or Slag)

Amorphous Silicon Dioxide (SiO2) with chemical additives (e.g., Cobalt for blue color)

Blue Goldstone

Synthetic Avanturine Glass (or Aventurine Glass)

Dyed or synthetic turquoise-blue glass-like specimen

Likely man-made colored glass or resin; exact identification requires testing

Cobalt Glass Slug (Man-made Glass)

Amorphous Silica with Cobalt Oxide (SiO2 + CoO)

Likely polished quartz or glass-like mineral cabochon

Probably quartz (SiO₂), though the image cannot exclude man-made glass

Dyed Agate

Chalcedony (SiO2)

Opalite

Synthetic Opalised Glass

Titanium Aura Quartz (Bismuth-coated Druzy)

Silicon Dioxide (SiO2) with Titanium/Metal vapor coating

Carborundum (Silicon Carbide)

Silicon Carbide (SiC)

Crushed Stone (Likely Limestone or Granite)

Calcium Carbonate (CaCO3) for Limestone / Quartz and Feldspar for Granite

Ferrous Slag

Iron/Steel Slag (Complex Calcium-Alumino-Silicates)

Sandstone Concretion

Sedimentary Clastic Rock (Silicate-rich)

Concrete

Hydrated Portland Cement Aggregate Composite

Magnetic Hematite (Man-made)

Iron Oxide (Fe2O3) with Barium-Strontium Ferrite

Concrete Rubble with Aggregate

Hardened Portland Cement Paste with Coarse Aggregate

Sandstone (with Liesegang rings or joints)

Clastic Sedimentary Rock (primarily Quartz with Iron Oxide cement)

Slag

Anthropogenic Vitreous Silica/Iron oxides

Concrete Paver (Artificial Cementitious Rock)

Hydrated Portland Cement Aggregate

Cullet Glass (Man-made Glass Slag)

Amorphous Silica (SiO2) with chemical additives

Concretion

Sedimentary Concretion (Ironstone / Calcite Concretion)