Mineral (Man Made Glass)

Polished black stone sphere (likely black basalt or black tourmaline)

Most likely fine-grained basalt (plagioclase–pyroxene); mineral identification is uncertain from the image alone

Titanium Aura Quartz (Aura Quartz)

Titanium-coated Silicon Dioxide (SiO2)

Small metallic-looking mineral/rock fragment

Indeterminate from image; possibly galena, hematite, or metallic slag

Chipped Glass/Plastic Fragment

Silicon dioxide (SiO2) for glass (amorphous) or various polymer compounds for plastic

Artisanal Glass Beads (Simulated Goldstone or Aventurine Glass)

Silicon Dioxide (SiO2) with metallic inclusions

Tumbled chalcedony (likely moss or dendritic agate)

Microcrystalline quartz, SiO₂, with iron-oxide inclusions

Mixed polished gemstone and mineral collection

Primarily quartz varieties (SiO₂), plus probable aventurine, rose quartz, amethyst, agate, jasper, serpentine, feldspar, and possibly dyed or man-made glass pieces

Blue glass-like tumbled specimen

Most likely cobalt-blue slag glass or manufactured glass; not confidently identifiable as a natural mineral from the image

Likely blue glass or synthetic gemstone jewelry

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

Obsidian

Obsidian (Volcanic Glass)

Pumice or vesicular volcanic tuff

Pumice: highly vesicular volcanic glass, chiefly rhyolitic to dacitic; possible tuff: lithified ash and pumice fragments

Sandstone (Quartzose)

Arenite (composed primarily of SiO2)

Diamond (or Diamond Simulant)

Carbon (C)

Quartz Pebble (Beach Chalcedony)

Silicon Dioxide (SiO2)

Fired Clay Brick (Anthropic Rock substitute)

Anthropogenic polycrystalline ceramic (predominantly Mullite and Quartz: Al6Si2O13 + SiO2)

Jasper

Silicon dioxide (SiO2) with impurities

Sandstone

Sedimentary Rock (Quartz Sandstone)

Blue Goldstone

Aventurine Glass

Green Slag Glass

Cullet (Amorphous Silicon Dioxide with impurities)

Smoky Quartz

Silicon Dioxide (SiO2) with trace aluminum and irradiation

Slag (Anthropogenic Glass/Iron byproduct)

Ferro-silicate Slag

Porcelain (Stoneware Ceramic)

Mullite / Silica-glass composite (Al6Si2O13)

Synthetic Resin (Artificial Specimen)

Polyurethane or Polyester Resin

Sandstone

Arenite (SiO2 composition dominant)

Green iridescent glass cabochon or synthetic gemstone

Likely synthetic glass; possibly coated synthetic quartz or lab-created green gemstone

Diamond (in jewelry setting)

Diamond (C - Carbon)

Green Glass Slag

Amorphous Silicon Dioxide (SiO2) with metal oxide impurities

Sandstone

Arenite (mostly SiO2)

Goldstone (likely blue-free synthetic goldstone pendant)

Synthetic aventurine glass; silica glass with dispersed metallic copper crystals

Blue Slag Glass

Amorphous Silica (Industrial byproduct)

Obsidian

Volcanic Glass (SiO2)

Asphalt Pavement (with aggregate)

Asphalt concrete

Pearl and Garnet Glass

Calcium Carbonate (CaCO3) for pearl; Silicon Dioxide (SiO2) for glass

Cullet Glass (Strawberry Glass)

Amorphous Silicon Dioxide (SiO2) with metallic dopants

Yellow Sapphire (Raw)

Corundum (Al2O3)

Red Jasper

Silicon Dioxide (SiO2) with Hematite (Fe2O3)

Sandstone (Water-worn Cobble)

Arenite (SiO2 with CaCO3 or Fe2O3 cement)

Green glassy slag (often sold as “sea glass” or “green obsidian”)

Industrial vitreous slag; primarily amorphous silicate glass, composition variable

Blue glassy mineral fragment, possibly sodalite or dyed/cobalt glass

Uncertain; likely sodalite (Na₈Al₆Si₆O₂₄Cl₂) if natural, but vivid blue color may indicate cobalt-colored glass

Pyrite

Iron Sulfide (FeS2)

Diamond

Carbon (C)

Aragonite

Aragonite (Calcium Carbonate - CaCO3)