Synthetic (Man Made Glass)

Cullet Glass (Slag Glass)

Amorphous Silicon Dioxide (Industrial Man-made)

Red glass-like crystal, likely synthetic ruby or red glass

Uncertain from image; possible corundum (ruby), Al₂O₃, or synthetic glass

One Pound Coin (UK)

Nickel-Brass Alloy (Cu-Zn-Ni)

Tumbled Clear Quartz/Rock Crystal

Silicon Dioxide (SiO2)

Milky quartz (likely)

Quartz, silicon dioxide (SiO₂)

Green Sea Glass

Man-made vitreous material (silica glass)

Blue Goldstone

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

Red gemstone ring, likely garnet or synthetic ruby

Possibly almandine garnet (Fe₃Al₂(SiO₄)₃) or corundum/ruby (Al₂O₃); image alone cannot distinguish

Polymer Clay (Mock Mineral)

Polyvinyl chloride (PVC) with plasticizers and pigment

Colorless faceted gemstone, likely glass or quartz

Uncertain; possibly quartz (SiO₂), but the strong uniform brilliance and apparent molded/faceted form may indicate leaded glass or cubic zirconia

Tumbled milky quartz

Quartz — silicon dioxide (SiO₂), cryptocrystalline or microcrystalline variety possible

Carved opalite pendant

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

Blue glassy gemstone-like specimen

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

Blue Obsidian

Volcanic Glass (Silica, SiO2)

Goldstone (Red)

Aventurine Glass (SiO2 + Cu)

Red glassy gemstone, possibly garnet

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

Green gemstone ring (likely synthetic or imitation emerald)

Possibly emerald, beryl (Be₃Al₂Si₆O₁₈); the photo cannot confirm the center stone’s identity or whether it is natural.

Quartz crystal fragment (likely milky quartz)

Quartz, silicon dioxide (SiO₂)

Terrazzo (Man-made Composite)

Cementitious or Resin-bound Lithic Composite

Sea Glass

Man-made vitreous material / Silicon dioxide

Tumbled milky quartz

Quartz (SiO₂), cryptocrystalline-to-massive variety

Blue Diamond

Carbon with Boron impurities (C)

Clear Quartz Sphere (Rock Crystal)

Silicon Dioxide (SiO2)

Diamond (or Simulant)

Carbon (C) or relevant simulant formula (e.g., ZrO2 for Cubic Zirconia)

Sea Glass

Man-made vitreous material (silica glass)

Polished opalite (likely man-made opalescent glass)

Opalite is a commercial name, not a mineral; typically opalescent glass, often soda-lime silicate glass

Pearl and Garnet Glass

Calcium Carbonate (CaCO3) for pearl; Silicon Dioxide (SiO2) for glass

Sea Glass

Man-made silicate glass (Amorphous silicon dioxide)

Beads (likely glass or man-made material)

N/A (artificial material)

Sea Glass

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

Goldstone

Man-made glass infused with metallic copper

Sea Glass

Man-made silicate glass weathering product

Blue Slag Glass

Anthropogenic Amorphous Silicon Dioxide

Sea Glass

Man-made vitreous material (silica-based glass)

Not a geological specimen

N/A (man-made object)

Tumbled milky quartz pebble

Quartz (silicon dioxide, SiO₂), opaque-to-translucent milky variety

Likely tumbled red mineral or glass imitation

Indeterminate; possibilities include red jasper (microcrystalline quartz, SiO₂) or dyed chalcedony

Artificial Rock Face (Faux Rock)

Glass Fiber Reinforced Concrete (GFRC)

Green Quartz / Chrysoprase / Sea Glass

Silicon Dioxide (SiO2)

Note on Image Identification: Textile

N/A (Anthropogenic material)

Goldstone

Man-made glass infused with copper particles

Clear quartz fragment

Quartz (silicon dioxide, SiO₂)