Man Made Object (Metalwork)

Diamond (or Simulant)

Carbon (C) or Cubic Zirconia (ZrO2)

Diamond (in a jewelry setting)

Carbon (C)

Asphalt Pavement (with aggregate)

Asphalt concrete

Blue Slag Glass

Amorphous Silica (Byproduct of smelting)

Cardstock (Paper)

Cellulose (C6H10O5)n

Blue Goldstone

Aventurine Glass (SiO2 with Cobalt/Copper inclusions)

Synthetic Resin (Artificial Specimen)

Polyurethane or Polyester Resin

Slag Glass (Cullet)

Amorphous Silicon Dioxide (SiO2) with metal oxide colorants

Slag (Anthropogenic Glass/Iron byproduct)

Ferro-silicate Slag

Artisanal Glass Beads (Simulated Goldstone or Aventurine Glass)

Silicon Dioxide (SiO2) with metallic inclusions

Polished dendritic agate or jasper pebble

Microcrystalline quartz (chalcedony), SiO₂, with dark manganese-oxide inclusions

Diamond-set gold ring

Diamond (crystalline carbon, C); mounted in a gold alloy setting

Likely faceted colorless gemstone

Probable quartz (rock crystal), SiO₂; diamond or topaz cannot be excluded from the photograph

White chalcedony cabochon ring

Chalcedony (microcrystalline quartz, SiO₂), likely white quartz variety

Pearl

Calcium Carbonate (Aragonite/Calcite) with Conchiolin, CaCO3

Green gemstone in a jewelry setting (possibly emerald or green glass)

Not identifiable from the image; if natural emerald, beryl (Be₃Al₂Si₆O₁₈)

Carved stone bowl or mortar

Uncertain; likely steatite (soapstone) or fine-grained volcanic stone

Likely fossilized shell or carbonate concretion

Indeterminate biogenic calcium carbonate, commonly calcite (CaCO₃)

Tumbled hematite (speculative identification)

Hematite, α-Fe₂O₃

Quartz pebble in concrete

Quartz (SiO₂), embedded in Portland-cement concrete

Blue-green opal, likely polished common or synthetic opal

Opal (hydrated amorphous silica, SiO₂·nH₂O); identification from the image is uncertain

Sea Glass

Amorphous Silicon Dioxide (SiO2)

Crackle Glass (Simulated Gemstone)

Amorphous Solid (SiO2)

Blue Goldstone

Synthetic glass with copper or cobalt/manganese inclusions

Blue Goldstone

Synthetic Aventurescent Glass (Cobalt-doped soda-lime glass)

Blue Goldstone

Aventurine glass (Synthetic borosilicate glass with cobalt and metallic inclusions)

Green Glass Slag

Amorphous Silicon Dioxide (SiO2) with metal oxide impurities

Porcelain (Stoneware Ceramic)

Mullite / Silica-glass composite (Al6Si2O13)

Glass Nugget (Tumbled Glass)

Amorphous Silicon Dioxide (SiO2) with additives

Goldstone (Brown)

Aventurine glass

Small polished metallic mineral specimen

Indeterminate from image; possibly galena or hematite

Chert (possibly a worked stone flake)

Microcrystalline quartz, SiO₂

Cut colorless gemstone, likely quartz or glass imitation

Most plausibly rock crystal (clear quartz, SiO₂); synthetic glass cannot be ruled out from the image

Blue slag glass / industrial smelter slag

Man-made iron-rich silicate slag; composition variable, commonly Fe–Ca–Mg–Al silicates with glassy phases

Tumbled/cut citrine quartz point

Quartz, silicon dioxide (SiO₂), likely heat-treated amethyst sold as citrine

Sea Glass (Frosted Glass)

Amorphous Silica (SiO2) with various metal oxide impurities

Small polished, multicolored stone; exact identification is not possible from the image

Undetermined; it may be a naturally patterned stone such as jasper, but the visible colors alone are insufficient for identification

Tumbled orange chalcedony or quartzite

Microcrystalline quartz (SiO₂), possibly iron-stained chalcedony; exact identification requires testing

Ammonite fossil

Fossilized ammonoid cephalopod; likely an involute ammonite, exact genus/species indeterminate

Polished agate/geode fragment

Chalcedony (microcrystalline quartz, SiO₂) with quartz and probable iron/manganese oxides

Tumbled labradorite

Labradorite, a calcium-rich plagioclase feldspar (approximately NaAlSi₃O₈–CaAl₂Si₂O₈)

Diamond (in Jewelry Setting)

Carbon (C)