Asphalt Concrete
Bituminous conglomerate
Category
Browse man made material (metal) specimens identified by the Rock Identifier community.
Asphalt Concrete
Bituminous conglomerate
Concrete Rubble with Aggregate
Hardened Portland Cement Paste with Coarse Aggregate
Milky quartz (likely quartz crystal fragment)
Quartz, silicon dioxide (SiO₂)
Asphalt / Road Aggregate
Bituminous Conglomerate (synthetic)
Small black stone fragment (possibly obsidian)
Unidentified dark rock; obsidian is volcanic glass (composition typically rhyolitic)
Chert Arrowhead (Projectile Point)
Microcrystalline Quartz (Chert or Flint)
Note: Item is a Synthetic/Man-made Object
Titanium-coated Stainless Steel (Fe-Cr-Ni-Ti)
Man-made Jewelry Charm (Enameled Metal)
Not a natural mineral; composed of base metal alloy (likely zinc or brass) and epoxy resin/enamel.
Blue Goldstone
Synthetic glass with copper or cobalt/manganese inclusions
Cubic Zirconia (Simulated Diamond)
Cubic Zirconia (ZrO2)
Sea Glass
Man-made vitreous material / Silicon dioxide
Asphalt Concrete (Bituminous Conglomerate)
Anthropogenic Bituminous Conglomerate
Blue Goldstone
Aventurine Glass
Concrete with Aggregate
Artificial Conglomerate (Cement and Aggregate)
Blue opalescent glass-like gemstone (possibly imitation opalite)
Likely man-made opalite glass; composition varies, typically silica-based glass
Blue Glass or Slag Glass
Amorphous Silica (Anthropogenic Glass)
Blue-green faceted gemstone, possibly glass or synthetic material
Not identifiable from the image; possible synthetic spinel or glass
ABS Plastic (Acrylonitrile Butadiene Styrene)
(C8H8)x·(C4H6)y·(C3H3N)z
Metallic sulfide mineral fragment, likely galena
Galena (lead sulfide, PbS), tentative identification
Concrete fragment with Aggregate
Anthropogenic Concrete with Calcarious and Siliceous Aggregate
Asphalt Concrete (Bituminous Pavement)
Aggregates in Bitumen Matrix
Opalite
Synthetic Opalised Glass
Opalite (a synthetic glass, often confused with Opal)
Silicon dioxide glass (SiO2nH2O, for natural opal)
Asphalt (Road Aggregate)
Asphalt concrete / Bituminous mixture
Blue Goldstone
Synthetic Avanturine Glass (or Aventurine Glass)
Opalite
Man-made synthetic glass with opalescent effects (SiO2 + metal oxides)
Aggregate Concrete
Anthropogenic Conglomerate (Technosol)
Concrete / Anthropogenic Conglomerate
Man-made composite material (Portland cement, aggregate, and water)
Native Silver
Silver (elemental Ag)
Terrazzo (Man-made Composite)
Cementitious or Resin-bound Lithic Composite
Beaded gemstone bracelet
Indeterminate; likely small polished mineral beads, possibly turquoise or dyed stone, with metal and glass components
Cullet Glass (Slag Glass)
Amorphous Silicon Dioxide (Industrial Man-made)
Beads (likely glass or man-made material)
N/A (artificial material)
Carved opalite pendant
Opalite (man-made opalescent glass; not a natural mineral)
Blue Slag Glass
Man-made Silicon Dioxide (Amorphous)
Concrete with Exposed Aggregate
Anthropogenic conglomerate (Concrete)
Asphalt Concrete
Bituminous Concrete (Anthropic Rock)
Concrete Paver (Artificial Cementitious Rock)
Hydrated Portland Cement Aggregate
Titanium Amethyst Geode
Silicon Dioxide (SiO2) with Titanium/Metal Vapor Deposition Layer
N/A - Man-made object (Jewelry Chain)
Antiqued or Oxidized Metal Chain (often Steel or Brass)
Tumbled black stone, likely black obsidian
Obsidian (volcanic glass; chiefly silica-rich rhyolitic composition)
Diamond-set gold ring
Diamond (carbon, C) in a gold alloy setting; the clear center stone may be a diamond or a diamond simulant