Man Made Object (Coin)

Malaysian 50 Sen Coin

Coinage (specific alloy unknown without metallurgical analysis, but typically brass or bronze for this denomination and era)

Synthetic Resin / Plastic Figurine

Synthetic Polymer (Copolymer of Polyethylene or Resin)

Not a geological specimen

N/A (man-made object)

Ring with an Orange Inlay

N/A (Man-made object)

Not a rock, mineral, or geological specimen

Synthetic Resin Charm (Seal Shape)

Polymer Resin with plastic glitter / Polyethylene terephthalate glitters

One Pound Coin (UK)

Nickel-Brass Alloy (Cu-Zn-Ni)

Bouncy Ball (Synthetic Rubber Polymer)

Polybutadiene / Ethylene Vinyl Acetate (EVA)

Titanium-coated Metal Cube (Man-made Fidget Toy)

Titanium-anodized or electroplated alloy (e.g., Ti-coated Zinc or Aluminum)

Red glassy gemstone, possibly garnet

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

Chert Arrowhead (Projectile Point)

Microcrystalline Quartz (Chert or Flint)

Transit Token (RTD Denver)

Nickel-plated brass or bronze alloy (Cu-Sn-Zn-Ni)

Chakra Stone Tower (Composite Multi-Mineral)

Crystalline Silicon Dioxide composite (SiO2) with various inclusions

Lava Rock with Fabric Impression

Scoria or Basalt with anthropogenic impressions

Note: This is a Man-Made Object (Costume/Prop Patch)

Synthetic fiber and pigments (Cellulose/Plastic-based composite)

Metal Chain Belt with Square Plates

Not applicable (man-made)

Man-made earbud charging case (Not a rock or mineral)

Acrylonitrile Butadiene Styrene (ABS) Plastic with electronic components

Man-made Synthetic Material (Plastic/Composite)

Acrylonitrile Butadiene Styrene (ABS) or High-Impact Polystyrene (HIPS)

N/A - Non-Geological Item

Brick fragment (Man-made material)

N/A (Fired clay)

Polished labradorite pendant

Labradorite, a calcium-rich plagioclase feldspar (approximately NaAlSi₃O₈–CaAl₂Si₂O₈)

Clear quartz crystal (likely)

Quartz, silicon dioxide (SiO₂)

Man-made Crystal (Lead Glass)

Lead oxide-doped Silica Glass (approx. SiO2 + PbO)

Sea Glass

Man-made vitreous material

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).

Green glass sphere/marble

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

Man-made Ceramic / Clay Figurine

Aluminosilicate Ceramic (Processed Clay)

Carved Stone Turtle

Carved Soapstone and Quartz

Clear quartz sphere

Quartz (silicon dioxide, SiO₂)

Sea Glass

Man-made silicate glass

Dyed or synthetic turquoise-blue glass-like specimen

Likely man-made colored glass or resin; exact identification requires testing

Opalite

Synthetic glass / Opalized glass

US Penny

Cuprum (Copper: Cu) and Zincum (Zinc: Zn) Alloy

Man-made Jewelry Charm (Enameled Metal)

Not a natural mineral; composed of base metal alloy (likely zinc or brass) and epoxy resin/enamel.

Possible weathered basalt or slag fragment

Basalt, chiefly plagioclase and pyroxene; identification is uncertain from the image

Milky quartz (likely)

Quartz, silicon dioxide (SiO₂)

Tumbled black stone, likely black obsidian

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

Likely polished quartz or glass-like mineral cabochon

Probably quartz (SiO₂), though the image cannot exclude man-made glass

Aluminum Slag

Anthropogenic Aluminum (Al)

Green glass cabochon or tumbled stone

Indeterminate; likely man-made glass, possibly aventurine glass rather than a natural mineral

Sea Glass

Man-made silicate glass weathering product

Cullet Glass / Slag Glass

Amorphous silica glass