Man Made (Synthetic Rock)

Obsidian

Volcanic Glass

Note: Item is a Synthetic/Man-made Object

Titanium-coated Stainless Steel (Fe-Cr-Ni-Ti)

Faceted clear gemstone, likely quartz or glass imitation

Most likely quartz (SiO₂); exact identification requires refractive-index and hardness tests

Note on Image Identification: Textile

N/A (Anthropogenic material)

Opalite

Synthetic Glass, SiO2 base with metallic inclusions

Obsidian

Volcanic Glass

Blue Goldstone

Synthetic Avanturine Glass (or Aventurine Glass)

Not a rock, mineral, or geological specimen

Blue Sapphire (Synthetic or Man-made Glass Imitation)

Corundum (Al2O3) if natural; Lead-glass or Spinal if synthetic

Red-orange cabochon, likely carnelian or glass imitation

Carnelian: chalcedony (microcrystalline SiO₂), commonly iron-colored

Dyed Crackle Quartz

Silicon Dioxide (SiO2) with synthetic dye

Opalite-style pendant (likely synthetic glass, not natural opal)

Opalescent glass; commonly sold as “opalite” (not a recognized mineral species)

Hematite

Iron(III) oxide (Fe2O3)

Blue opalescent glass-like gemstone (possibly imitation opalite)

Likely man-made opalite glass; composition varies, typically silica-based glass

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

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

Blue Goldstone

Aventurine Glass

Faceted clear gemstone ring, likely quartz or glass imitation

Unidentified colorless faceted material; quartz (SiO₂) is possible, but the image cannot distinguish it from glass or another gem

Chert (Arrowheads)

Microcrystalline Quartz (SiO2)

Sandstone Concretion

Sedimentary Concretion (Quartz-cemented sand)

Exposed Aggregate Concrete (Pea Gravel)

Concrete with Siliceous Alluvial Gravels

Green Glass (often marketed as 'Obsidian' or 'Green Quartz')

Amorphous Silica (SiO2) with copper or chromium additives

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

Acrylonitrile Butadiene Styrene (ABS) Plastic with electronic components

Asphalt Concrete

Bituminous conglomerate

Slag (Industrial Byproduct)

Artificial silicate/iron byproduct

Unidentifiable Rock Fragment

Polymer Clay (Mock Mineral)

Polyvinyl chloride (PVC) with plasticizers and pigment

Man-made Blank Ammunition (Brass)

CuZn (Cartridge Brass - roughly 70% Copper, 30% Zinc)

Concrete

Anthropogenic Conglomerate

Man-made Glass (Tumbled/Shaped)

Amorphous Silicon Dioxide (SiO2) with metal oxide colorants

Opalite

Man-made synthetic glass with opalescent effects (SiO2 + metal oxides)

Concrete Fragment

Hardened Portland cement and mineral aggregate

Goldstone

N/A (Synthetic Glass with Copper Inclusions)

Asphalt Concrete (Bituminous Conglomerate)

Anthropogenic Bituminous Conglomerate

Clear Quartz Sphere (Rock Crystal)

Silicon Dioxide (SiO2)

Aggregate Concrete

Anthropogenic Conglomerate (Technosol)

Small clear crystal, possibly quartz or glass-like gemstone

Uncertain; likely quartz (SiO₂), but the image is insufficient to exclude man-made glass or cubic zirconia

Metal Chain Belt with Square Plates

Not applicable (man-made)

Terrazzo (Man-made Composite)

Cementitious or Resin-bound Lithic Composite

Artificial Rock Face (Faux Rock)

Glass Fiber Reinforced Concrete (GFRC)

Small black stone fragment (possibly obsidian)

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

Concrete Rubble with Aggregate

Hardened Portland Cement Paste with Coarse Aggregate

Cobalt Glass Slug (Man-made Glass)

Amorphous Silica with Cobalt Oxide (SiO2 + CoO)