Man Made Rock (Technosol)

Beads (likely glass or man-made material)

N/A (artificial material)

Blue Obsidian

Volcanic Glass (SiO2 with inclusions)

Green glass sphere/marble

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

Blue Obsidian

Volcanic Glass (Silica, SiO2)

Aura Quartz (specifically Titanium Aura Quartz)

Titanium-coated Silicon Dioxide (SiO2 + Ti Coating)

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)

Likely blue-green glassy slag or a weathered mineral fragment

Unidentified; the image does not show diagnostic features sufficient for a mineral identification

Asphalt Chunk

Asphalt concrete

Rock crystal (clear quartz), possibly cloudy quartz

Quartz, silicon dioxide (SiO₂)

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)

Carved opalite pendant

Opalite (man-made opalescent glass; not a natural mineral)

Purple glassy pebble, possibly slag glass

Unidentified; likely man-made glass rather than a natural mineral

Sea Glass (specifically Frosted White)

Amorphous Silica (substance: Sodium-calcium silicate glass)

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)

Quartz crystal fragment (likely milky quartz)

Quartz, silicon dioxide (SiO₂)

Goldstone (brown goldstone)

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

Titanium Aura Quartz

Titanium-coated Silicon Dioxide (SiO2)

Chert (Chalky Flint Node)

Chert (Microcrystalline Quartz, SiO2)

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)

Red glassy gemstone, possibly garnet

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

Colorless quartz crystal (likely quartz fragment)

Quartz, silicon dioxide (SiO₂)

Milky quartz (likely)

Quartz, silicon dioxide (SiO₂)

Tumbled black stone, likely black obsidian

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

Polymictic conglomerate or breccia (possibly concrete-like aggregate)

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

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

Cubic Zirconia (Jewelry Setting)

Zirconium Dioxide (ZrO2)

Diamond

Native Carbon (C)

Blue Slag Glass

Anthropogenic Amorphous Silicon Dioxide

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)

Blue Goldstone

Synthetic glass with cobalt and copper inclusions

Cubic Zirconia (Jewelry Setting)

Cubic Zirconia (ZrO2)

Aluminum Slag

Anthropogenic Aluminum (Al)

Cullet (Slag Glass)

Amorphous Silica (SiO2) with various metal oxide colorants