Man Made Material, Not A Natural Rock Or Mineral Specimen

Cullet Glass (Slag Glass)

Amorphous Silicon Dioxide (SiO2) with metallic oxide impurities

Polymictic conglomerate or breccia (possibly concrete-like aggregate)

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

Tumbled opalite (likely man-made glass)

Opalite glass; a synthetic opalescent glass, not a natural mineral species

Blue Diamond

Carbon with Boron impurities (C)

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

Decorative mosaic cross containing mixed rock and glass fragments

Polychrome aggregate; likely quartz, feldspar, marble, granite, and assorted colored glass

Brick veneer, likely manufactured from clay-rich shale

Fired clay brick; chiefly aluminosilicate minerals, commonly mullite and glassy silicate phases after firing

Cullet Glass (Slag Glass)

Amorphous Silicon Dioxide (Industrial Byproduct)

Tumbled clear quartz (rock crystal)

Quartz, silicon dioxide (SiO₂)

Clam shell (likely a bivalve shell)

Bivalvia; shell composed primarily of calcium carbonate (usually aragonite and/or calcite)

Costume Jewelry with Synthetic Gemstones

Synthetic Cubic Zirconia and Glass (SiO2 / ZrO2)

Rose Quartz and Cherry Quartz (Dyed Glass/Quartz)

Silicon Dioxide (SiO2) with inclusions/dye

Blue cabochon gemstone, likely synthetic glass or dyed stone

Indeterminate from image; possible glass, synthetic spinel, sodalite, or lapis lazuli

Concrete Rubble with Aggregate

Hardened Portland Cement Paste with Coarse Aggregate

Polymer Clay (Mock Mineral)

Polyvinyl chloride (PVC) with plasticizers and pigment

Asphalt Concrete (Bituminous Pavement)

Aggregates in Bitumen Matrix

Ring with an Orange Inlay

N/A (Man-made object)

Opalite glass sphere (likely synthetic imitation)

Man-made opalescent glass; not natural opal

White sea glass (naturally frosted glass fragment)

Man-made silicate glass, typically soda-lime glass; not a mineral or rock

Carborundum

Silicon Carbide (SiC)

Goldstone beads (likely brown goldstone)

Man-made copper-bearing glass; not a natural mineral. Often sold as “aventurine glass.”

Goldstone

Aventurine Glass (Man-made)

Crackle Agate / Dyed Quartz

SiO2 (Silicon Dioxide)

Polished black pebble, possibly obsidian

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

Clear quartz tumbled stone

Quartz (silicon dioxide, SiO₂)

Opalite

Synthetic Glass (Hydrated Silica Simulant)

Asphalt Chunk (Bituminous Concrete)

Aggregated Bitumen / Artificial Breccia

Titanium Aura Quartz

Titanium-coated Silicon Dioxide (SiO2)

Crackled Quartz (Dyed)

Silicon Dioxide (SiO2)

Opalite

Opalescent Glass (SiO2 + coloring agents)

Opalite (a synthetic glass)

Silicon Dioxide (SiO2) with various additives; not a true mineral but a man-made gem simulant

Aura Quartz (Titanium/Rainbow Quartz)

SiO2 (Silicon Dioxide) with metallic coating

Opalite

Synthesized glass / Silicon dioxide

Opaline Glass (Opalite)

Synthetic Silicon Dioxide Glass

Gemstone-set ring, likely cubic zirconia or diamond

Likely synthetic cubic zirconia (zirconium dioxide, ZrO₂); stones may alternatively be diamond (carbon, C)

Blue tumbled glass-like specimen; likely blue slag glass

Likely man-made glass (silicate glass), not a natural mineral; exact material cannot be confirmed from the image

Metal Chain Belt with Square Plates

Not applicable (man-made)

Asphalt Concrete

Bituminous Concrete

Synthetic Resin Charm (Seal Shape)

Polymer Resin with plastic glitter / Polyethylene terephthalate glitters

Concrete Fragment

Hardened Portland cement and mineral aggregate

One Pound Coin (UK)

Nickel-Brass Alloy (Cu-Zn-Ni)

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).