Antropogenic Rock (Man Made)

Red Slag Glass

Amorphous Silica (Industrial byproduct with metallic oxide dopants)

Polished obsidian

Volcanic glass; predominantly rhyolitic SiO₂

Opalite

Synthetic Glass (Amorphized Silicon Dioxide)

Opalite

Synthetic Glass (Simulated Opal)

Opalite

Synthetic Glass (Simulated Opal)

Synthetic Resin / Plastic Figurine

Synthetic Polymer (Copolymer of Polyethylene or Resin)

Cullet Glass (Slag Glass)

Amorphous Silicon Dioxide (Industrial Byproduct)

Aura Quartz

Titanium or Gold bonded Silicon Dioxide (SiO2)

Blue Obsidian

Volcanic Glass (SiO2 with inclusions)

Green glass sphere/marble

Soda-lime glass (primarily SiO2, Na2O, CaO)

Dalmatian jasper

Porphyritic microcrystalline quartz-rich rock, commonly sold as Dalmatian jasper; spots are chiefly arfvedsonite/amphibole minerals, sometimes altered feldspar

Metal Alloy (Likely Pewter or Sterling Silver)

Not a natural geological specimen; composed of refined metals. If pewter, it's a tin-based alloy. If sterling silver, it's 92.5% silver and 7.5% other metals (usually copper).

Blue Obsidian (Cullet Glass)

Silicon Dioxide (Amorphous Glass)

Beads (likely glass or man-made material)

N/A (artificial material)

Aura Quartz (specifically Titanium Aura Quartz)

Titanium-coated Silicon Dioxide (SiO2 + Ti Coating)

Sea Glass (specifically Frosted White)

Amorphous Silica (substance: Sodium-calcium silicate glass)

Opalite

Synthetic Opalized Glass

Opalite (Synthetic Moonstone/Opal)

Synthetic Silica Glass

Quartz (Engineered Stone Countertop)

Silicon Dioxide (SiO2) with polymer resins

Aluminum Slag

Anthropogenic Aluminum (Al)

Man-made Polished Porcelain Tile (Artificial Geologic Lookalike)

Fused Silicate Ceramic with Alumina (Synthetic Kaolinite derivative)

Carborundum (Silicon Carbide)

Silicon Carbide (SiC) / Moissanite (natural form)

Rock crystal (clear quartz), possibly cloudy quartz

Quartz, silicon dioxide (SiO₂)

Blue Slag Glass

Anthropogenic Amorphous Silicon Dioxide

Colorless quartz crystal (likely quartz fragment)

Quartz, silicon dioxide (SiO₂)

Quartz crystal fragment (likely milky quartz)

Quartz, silicon dioxide (SiO₂)

Titanium Aura Quartz

Titanium-coated Silicon Dioxide (SiO2)

Chert (Chalky Flint Node)

Chert (Microcrystalline Quartz, SiO2)

Asphalt Chunk

Asphalt concrete

Red glassy gemstone, possibly garnet

Unidentified red transparent material; garnet group (X₃Y₂(SiO₄)₃) is a possibility

Opalite Egg

Synthetic Glass (Simulated Opal)

Rainbow Hematite Ring

Iron(III) oxide (Fe2O3) with thin-film coating

Concrete with Aggregate

Artificial Conglomerate (Cement and Aggregate)

Opalite

Opalescent Glass (SiO2 + coloring agents)

Milky quartz (likely)

Quartz, silicon dioxide (SiO₂)

Tumbled black stone, likely black obsidian

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

Titanium Aura Quartz (Bismuth-coated Druzy)

Silicon Dioxide (SiO2) with Titanium/Metal vapor coating

Polymictic conglomerate or breccia (possibly concrete-like aggregate)

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

Goldstone (brown goldstone)

Man-made aventurine glass, typically copper-bearing silica glass

Blue glassy gemstone-like specimen

Indeterminate; possibly dyed or treated turquoise, blue apatite, or man-made glass

Green Aventurine

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

Polished blue glassy mineral specimen, likely sodalite or blue aventurine

Most consistent with sodalite (Na₈Al₆Si₆O₂₄Cl₂), though dyed quartzite or blue glass cannot be excluded from the photograph