Antropogenic (Man Made Industrial Byproduct)

Possible iron meteorite

Metallic meteorite, likely Fe–Ni alloy (kamacite/taenite)

Botryoidal chalcedony (likely agate/jasper variety)

Microcrystalline quartz, SiO₂

Opalite

Synthetic Opalised Glass

Diamond

Carbon (C)

Red-orange cabochon, likely carnelian or glass imitation

Carnelian: chalcedony (microcrystalline SiO₂), commonly iron-colored

Baked-clay ceramic fragment (likely brick or pottery)

Fired clay, primarily aluminosilicate minerals; not a natural rock

Conglomerate

Conglomerate Rock (Paraconglomerate)

Sandstone Concretion

Clastic sedimentary rock (primarily Quartz SiO2)

Green Aventurine

Quartzite with Fuchsite inclusions (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)

Polished black pebble, possibly obsidian

Volcanic glass (obsidian), likely; identification is tentative from the image

Green sea glass (likely bottle glass)

Man-made soda–lime silicate glass; not a natural mineral

Sea Glass

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

Diamond (or Simulant)

Carbon (C) or Cubic Zirconia (ZrO2)

Blue glassy tumbled stone, likely blue chalcedony or slag glass

Chalcedony (microcrystalline SiO₂), possibly man-made blue glass

Sea Glass

Amorphous Silicon Dioxide (Man-made glass weathered by nature)

Vesicular basalt (weathered scoria)

Scoriaceous basalt; chiefly plagioclase, clinopyroxene, olivine, and iron-titanium oxides

Tumbled milky quartz

Quartz (silicon dioxide, SiO₂)

Titanium Amethyst Geode

Silicon Dioxide (SiO2) with Titanium/Metal Vapor Deposition Layer

Blue-green cabochon, likely chalcedony or treated glass imitation

Cryptocrystalline quartz (chalcedony/possibly chrysoprase); identification uncertain from image

Blue Obsidian

Volcanic Glass (SiO2 with inclusions)

Diamond (or Diamond Simulant)

Carbon (C)

Polished blue calcite sphere (tentative identification)

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

Milky quartz (rough fragment)

Quartz, silicon dioxide (SiO₂)

Rock crystal (clear quartz), possibly cloudy quartz

Quartz, silicon dioxide (SiO₂)

Hematite

Iron(III) oxide (Fe2O3)

Copper slag or vesicular basalt with copper minerals

Industrial slag / Basaltic matrix with secondary copper minerals

Goldstone (Red)

Aventurine Glass (SiO2 + Cu)

Synthetic Resin (Artificial Specimen)

Polyurethane or Polyester Resin

Blue Crackle Quartz (Dyed Quarzite)

Silicon Dioxide (SiO2) with artificial dye

Dyed Blue Agate (Dragon Vein Agate)

Silicon Dioxide (SiO2) with artificial cobalt/organic dyes

Dyed Aura Quartz

Silicon Dioxide (SiO2) with metallic coating

Granite with Cupules / Bedrock Mortars

Granite (felsic intrusive plutonic rock)

Likely slag or metallic industrial byproduct

Unidentified iron-rich ferrous slag; possibly magnetite-bearing slag

Slag Glass

Glassy Silicate Residue

Ferruginous Slag (Iron Smelting Byproduct)

Anthropogenic Vitreous Silicate (often containing Fayalite: Fe2SiO4)

Red-orange jasper pebble (tentative)

Microcrystalline quartz, SiO₂, colored mainly by iron oxides

Synthetic Convention Badge (Plastic/PVC)

Polyvinyl Chloride (PVC) / Polycarbonate

Polymictic conglomerate or breccia (possibly concrete-like aggregate)

Lithified polymictic gravel; clasts may include basalt, granite, quartzite, and other silicates

Opalite

Synthetic glass (SiO2 + metal additions)

Orange Calcite

Calcium Carbonate (CaCO3)

Anthracite Coal with Sulfur staining

Anthracite (Carbon C with impurities)

Blue chalcedony (likely dyed or treated)

Microcrystalline quartz, SiO₂ (chalcedony)