Anthropogenic Specimen (Man Made Material)

Polished blue calcite sphere (tentative identification)

Calcite, CaCO₃; blue color generally results from trace impurities or inclusions

Chert (Jasper variety)

Silicon Dioxide (SiO2)

Weathered iron-rich rock, possibly jasper or ironstone

Likely limonite/goethite-bearing siliceous rock; exact identification requires hardness and streak tests

Conglomeratic concrete or asphalt aggregate surface with dark bituminous chunks

Polymictic gravel aggregate; dark pieces likely bitumen/asphalt, not a natural rock

Brick

Fired clay or Ceramic material (no specific mineralogical scientific name as it's a composite)

Opalite

Synthetic Opalised Glass

Dyed Agate

Chalcedony (SiO2)

Goldstone (aventurine glass)

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

Sea Glass

Man-made silicate glass (Amorphous silicon dioxide)

Chert (Arrowhead/Tool variety)

Microcrystalline Quartz (SiO2)

Asphalt (Bituminous Concrete)

Bituminous Concrete / Pavement

Diamond (as set in a gold ring)

Carbon (C)

Concretion

Sedimentary Concretion (Ironstone / Calcite Concretion)

Sandstone (with Liesegang rings or joints)

Clastic Sedimentary Rock (primarily Quartz with Iron Oxide cement)

Sandstone Concretion

Sedimentary Clastic Rock (Silicate-rich)

Sandstone Concretion

Clastic Sedimentary Concretion (typically Quartz/Silica with Iron Oxide)

Slag (Industrial Glass)

Anthropogenic Amorphous Vitreous Silicate

Opalite (Man-made Glass)

Fused glass (typically made of dolomite and metal opacifiers)

Carved Stone Turtle

Carved Soapstone and Quartz

Green glassy mineral specimen, likely rough emerald or green fluorite

Tentatively beryl (Be₃Al₂Si₆O₁₈), emerald variety; synthetic/man-made glass cannot be excluded from the photograph

Sandstone

Arenite (SiO2 based clastic rock)

Chert Nodule (Flint)

Chert (Silicon Dioxide, SiO2)

Man-made Glass (Tumbled/Shaped)

Amorphous Silicon Dioxide (SiO2) with metal oxide colorants

Chert / Jasper

Silicon Dioxide (SiO₂)

Diamond (in a gold ring)

Diamond (pure carbon, C)

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.)

Libyan Desert Glass

Libyan Desert Glass (SiO2 with trace elements)

Asphalt (Bituminous Concrete)

Composite material (bitumen binder with mineral aggregate)

Blue-green chrysocolla rough specimen

Chrysocolla, hydrated copper aluminosilicate; commonly associated with malachite, quartz, and limonite

Blue Goldstone

Synthetic Avanturine Glass (or Aventurine Glass)

Banded Chert (River Stone)

Silicon Dioxide (SiO2)

Chert (Arrowhead/Projectile Point)

Cryptocrystalline Quartz (SiO2)

Man-made Ceramic / Clay Figurine

Aluminosilicate Ceramic (Processed Clay)

Mother of Pearl (Nacre) / Shell Fragment

Biogenic Calcium Carbonate (Aragonite and Conchiolin)

Chert (specifically Jasper or Flint)

Cryptocrystalline Quartz (SiO2)

Aura Quartz

Titanium-coated Silicon Dioxide (SiO2)

Opalite

Synthetic Opalized Glass (SiO2 + additives)

Opalite

Synthetic Glass (Simulated Opal)

Concrete or asphalt-like aggregate surface with a dark fragment

Uncertain; likely artificial concrete containing mixed lithic aggregate, not a natural rock

Aqua Aura Quartz

Titanium/Gold-coated Silicon Dioxide (SiO2)

Dyed Agate / Painted Stone

Silicon Dioxide (SiO2) with artificial pigment

Opalite

Synthetic Fluorescent Glass (SiO2 + impurities)