Synthetic (Man Made Material Mimicking Natural Stone)

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

Man-made Carved Stone (Scream Mask/Skull motif)

Carved Soapstone or Serpentine-rich rock

Diamond

Carbon (C)

Decorative mosaic cross containing mixed rock and glass fragments

Polychrome aggregate; likely quartz, feldspar, marble, granite, and assorted colored glass

Exposed Aggregate Concrete (Pea Gravel)

Concrete with Siliceous Alluvial Gravels

Man-made Green Quartz (Lab-grown or Treated)

Silicon Dioxide (SiO2) with artificial coloration

Asphalt Concrete

Bituminous Concrete (Anthropic Rock)

Diamond

Native Carbon (C)

Star sapphire ring

Corundum (Al₂O₃), likely asteriated sapphire

Carved Stone Turtle

Carved Soapstone and Quartz

Faceted blue gemstone, likely blue topaz or synthetic spinel

Topaz (Al₂SiO₄(F,OH)₂) or synthetic spinel (MgAl₂O₄); image insufficient for certainty

Goldstone

Not a natural mineral or rock. It is an ornamental glass.

Green obsidian (likely molded or heat-treated glass-like specimen)

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

Carborundum

Silicon Carbide (SiC)

Cullet (Slag Glass)

Amorphous Silica (Industrial byproduct)

Amethyst (likely synthetic or treated)

Purple quartz, SiO₂; color caused mainly by trace iron and irradiation

Dyed Aura Quartz

Silicon Dioxide (SiO2) with metallic coating

Aura Quartz

Silicon Dioxide (SiO2) with metallic vapor coating

Goldstone

Avventurina (Cu + SiO2 glass)

Tumbled black stone, likely black obsidian

Obsidian (volcanic glass; chiefly silica-rich rhyolitic composition)

Sandstone (likely Fossilized Wood or Concrete Simulacrum)

Arenite / Silicified Wood / Anthropogenic Concrete

Diamond (or Cubic Zirconia simulant)

Carbon (C) - Diamond / Zirconium dioxide (ZrO2) - CZ

Sea Glass

Amorphous silicon dioxide (man-made glass weathered by nature)

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 (Brown/Gold)

Aventurine Glass (Man-made glass with Copper inclusions)

Synthetic Resin (Artificial Specimen)

Polyurethane or Polyester Resin

Possible weathered basalt or slag fragment

Basalt, chiefly plagioclase and pyroxene; identification is uncertain from the image

Slag Glass

Vitreous Silicate Residue

Not a geological specimen

N/A (man-made object)

Clear faceted gemstone in a metal jewelry setting (likely imitation glass or cubic zirconia)

Unidentified transparent faceted stone; possibly cubic zirconia (ZrO₂) or glass

Aura Quartz (Titanium/Gold coated)

Silicon Dioxide (SiO2) with metallic vapor deposition

Smelter Slag

Anthropogenic Silicate Slag

Likely blue glass or synthetic gemstone jewelry

Uncertain; possibly synthetic spinel, cubic zirconia, or blue glass

Slag (Industrial Byproduct)

Artificial silicate/iron byproduct

Faceted Gemstones (Mixed)

Various (e.g., Corundum, Beryl, Quartz, or synthetic equivalents)

Sandstone Anvil / Nutting Stone

Quartzose Sandstone (Sedimentary Rock)

Diamond (or Cubic Zirconia)

Carbon (C) or Zirconium Dioxide (ZrO2)

Red Slag Glass

Amorphous Silica (Industrial byproduct with metallic oxide dopants)

Likely tumbled red mineral or glass imitation

Indeterminate; possibilities include red jasper (microcrystalline quartz, SiO₂) or dyed chalcedony

Silicon Carbide (Carborundum)

Silicon Carbide (SiC) / Moissanite (natural)

Metal Chain Belt with Square Plates

Not applicable (man-made)

Blue Obsidian

Volcanic Glass (SiO2 with inclusions)