Man Made Glass (Not A Natural Rock Or Mineral)

Sea Glass (White/Clear)

Amorphous Silica (Alkali-Lime-Silica Glass), SiO2 + Na2O + CaO

Luminous Stone (Glow-in-the-dark Synthetic/Man-made Stone)

Strontium Aluminate tinted glass or resin (Crystalline silicate/oxide mix)

Rough Diamond

Native Carbon (C)

Diamond (in a gold ring)

Diamond (pure carbon, C)

Artificial Rock Face (Faux Rock)

Glass Fiber Reinforced Concrete (GFRC)

Concretion with Geode Cavity

Ferruginous Sandstone Concretion with Quartz Center

Bismuth Crystal

Bismuth (Bi)

Goldstone (Synthetic Aventurescence Glass)

Cuprous Aventurescent Glass (Silicon Dioxide with Copper inclusions)

Mixed beach-stone and tumbled-glass collection

Predominantly uncertain rocks (likely basalt, granite, and quartz-bearing stones) with anthropogenic glass; one possible banded agate or jasper

Asphalt (Bituminous pavement)

Bituminous concrete / Asphalt

Obsidian

Volcanic Glass (Amorphous Silicon Dioxide)

Colorless faceted quartz-like gemstone

Likely quartz (SiO₂), though the appearance may also indicate man-made glass or cubic zirconia

Diamond

Carbon (C)

Tumbled amber-colored chalcedony or jasper

Microcrystalline quartz (SiO₂), likely iron-stained chalcedony/jasper

Blue Goldstone

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

Botryoidal chalcedony (likely agate/jasper variety)

Microcrystalline quartz, SiO₂

Green Slag

Anthropogenic Silicate Glass

Aura Quartz (Anomalously Coated Quartz)

Silicon Dioxide (SiO2) treated with vaporized metals

Likely clear quartz crystal (possibly cut/polished quartz or glass imitation)

Quartz, silicon dioxide (SiO₂)

Carborundum (Silicon Carbide)

Silicon Carbide (SiC)

Metal Chain (Likely Steel or a Steel Alloy)

Steel (primarily iron and carbon); specific alloy unknown

Iron Slag

Iron/Steel Slag (Ferrosilicate Glass)

Sandstone (specifically Arkose or Quartz Arenite)

Arenite (primarily SiO2 with possible Feldspar)

Diamond (in a jewelry setting)

Diamond (Carbon, C)

Asphalt Concrete (Bituminous Concrete)

Bituminous aggregate

Red-orange jasper pebble (tentative)

Microcrystalline quartz, SiO₂, colored mainly by iron oxides

Note: Item is a Synthetic/Man-made Object

Titanium-coated Stainless Steel (Fe-Cr-Ni-Ti)

Blue opalite (often sold as synthetic opal)

Opalite glass; amorphous hydrated silica if natural opal (SiO₂·nH₂O)

Blue Goldstone

Aventurine Glass

Man-made Synthetic Material (Costume Faux Fur)

Synthetic Polymer (Polyester/Acrylic)

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

Silicon Dioxide (SiO2) with artificial coloration

Granite

Granite (phaneritic intrusive igneous rock consisting of quartz, feldspar, and mica)

Sandstone

Arenite (SiO2 based)

Carborundum (Silicon Carbide)

Silicon carbide (SiC)

Fossiliferous limestone with colonial coral

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

Blue Apatite

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

Slag Glass (Cullet)

Amorphous Silica / Glass residue

Sandstone

Sedimentary Rock (Quartz Sandstone)

Diamond (in a cluster setting)

Crystallized Carbon (C)

Cobalt Glass Slug (Man-made Glass)

Amorphous Silica with Cobalt Oxide (SiO2 + CoO)

Vesicular basalt (probable iron-rich volcanic rock)

Basalt; chiefly plagioclase, clinopyroxene, olivine, and Fe-Ti oxides

Titanium Aura Quartz (Aura Quartz)

Titanium-coated Silicon Dioxide (SiO2)