Man Made Material, Not A Natural Rock Or Mineral Specimen

Blue Goldstone

Man-made glass with cobalt and metal flecks

Small rock fragment (unidentified)

Undetermined; the image does not show enough detail for reliable identification

Likely iron-rich slag or weathered ironstone fragment

Uncertain; possibly iron oxide–rich material (hematite/goethite) or industrial iron slag

Small rough mineral/rock specimen (not confidently identifiable)

Undetermined; image detail is insufficient for a reliable identification

Asphalt (Road Aggregate)

Bituminous Conglomerate / Asphalt Concrete

Likely blue-green glassy slag or a weathered mineral fragment

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

Aggregate Concrete

Anthropogenic Conglomerate (Technosol)

Concrete / Conglomerate (Man-made)

Artificial Conglomerate (Cementitious Composite)

Slag (Industrial Byproduct)

Artificial silicate/iron byproduct

White pebble, likely quartz or calcite

Indeterminate from image; possible microcrystalline quartz (SiO₂) or calcite (CaCO₃)

Dyed or synthetic turquoise-blue glass-like specimen

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

Small black stone fragment (possibly obsidian)

Unidentified dark rock; obsidian is volcanic glass (composition typically rhyolitic)

Blue glassy gemstone-like specimen

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

Ocean Jasper Mushroom

Orbicular Jasper (Silicon Dioxide, SiO2 mixed with various impurities)

Cullet Glass / Slag Glass

Amorphous silica glass

Man-made Metal Pin (Non-geological)

Antimony-Lead Alloy or Zinc/Brass Base with Electroplating

Polished opalite (likely man-made opalescent glass)

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

Green Obsidian Sphere (man-made glass)

Vitreous Silica with Chromium/Iron additives

Goldstone (brown goldstone)

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

Blue-green faceted gemstone, possibly glass or synthetic material

Not identifiable from the image; possible synthetic spinel or glass

Concrete with Exposed Aggregate

Anthropogenic conglomerate (Concrete)

Citrine Quartz

Citrine (Silicon Dioxide, SiO2)

Opalite

Synthetic Opalized Glass

Exposed Aggregate Concrete (Pea Gravel)

Concrete with Siliceous Alluvial Gravels

Carved opalite pendant

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

Asphalt (Bituminous Pavement)

Bituminous mix (Aggregates with Bitumen binder)

Green sea glass (likely bottle glass)

Man-made soda-lime silicate glass; not a natural mineral

Red goldstone beads

Goldstone (man-made copper-bearing glass; not a natural mineral)

Polished black pebble, likely basalt

Basalt, a fine-grained mafic volcanic rock composed mainly of plagioclase feldspar and pyroxene, commonly with olivine

Blue glassy-looking specimen, possibly dyed or coated mineral

Not identifiable from the photograph; possibilities include dyed quartz or glassy slag, but composition cannot be established visually.

Cherry Quartz with Rose Quartz

Crystalline Quartz (SiO2) with glass-based synthetic components

Cobalt Blue Glass / Cullet Glass

Silicon dioxide (Amorphous man-made glass)

Opalite

Man-made Glass (SiO2 + additives)

Likely clear quartz pebble or glassy quartz fragment

Quartz (silicon dioxide, SiO₂)

Opalite (likely man-made glass)

Opalite is a trade name for opalescent glass, not a natural mineral; composition is typically silica glass with additives

Conglomerate

Conglomerate (clastic sedimentary rock)

Carnelian (red-orange chalcedony) beads

Microcrystalline quartz, SiO₂; chalcedony colored chiefly by iron oxides

Strawberry Quartz

Silicon Dioxide (SiO2) with Hematite or Goethite inclusions

Red glassy gemstone, possibly garnet

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

ABS Plastic (Acrylonitrile Butadiene Styrene)

(C8H8)x·(C4H6)y·(C3H3N)z

Baked-clay ceramic fragment (likely brick or pottery)

Fired clay, primarily aluminosilicate minerals; not a natural rock

Opalite

Synthetic glass / Simulated opal