Diamond (or Simulant)
Carbon (C) or relevant simulant formula (e.g., ZrO2 for Cubic Zirconia)
Category
Browse man made composite specimens identified by the Rock Identifier community.
Diamond (or Simulant)
Carbon (C) or relevant simulant formula (e.g., ZrO2 for Cubic Zirconia)
Brick
Fired clay or Ceramic material (no specific mineralogical scientific name as it's a composite)
ABS Plastic (Acrylonitrile Butadiene Styrene)
(C8H8)x·(C4H6)y·(C3H3N)z
Not a geological specimen
N/A (man-made object)
Nacre (Mother of Pearl)
Nacre (Biogenic Aragonite/Calcite composite, CaCO3)
Diamond
Native Carbon (C)
Seven Chakra Bonded Stone
Bonded composite of Red Jasper, Carnelian, Tiger's Eye, Aventurine, Lapis Lazuli, Amethyst, and Clear Quartz
Rose Quartz and Cherry Quartz (Dyed Glass/Quartz)
Silicon Dioxide (SiO2) with inclusions/dye
Not a rock, mineral, or geological specimen
Opalite
Synthetic glass / Opaque silicious glass
Engineered Quartz (Quartzite look-alike)
Silicon Dioxide (SiO2) composite
Asphalt (Bituminous Concrete)
Bituminous Concrete / Pavement
Mother of Pearl (Nacre) / Shell Fragment
Biogenic Calcium Carbonate (Aragonite and Conchiolin)
Concrete Fragment
Artificial Conglomerate (Cement and Aggregate)
Diamond (or Simulant)
Carbon (C)
Asphalt (Bituminous Concrete)
Composite material (bitumen binder with mineral aggregate)
Opalite
Man-made opalescent glass
Opalite
Man-made opalized glass
Goldstone
Aventurine Glass (Man-made)
Sea Glass
Man-made silicate glass
Slag Glass
Amorphous Silicate (Man-made)
Ring with an Orange Inlay
N/A (Man-made object)
Sea Glass
Man-made silicate glass
Sea Glass
Man-made vitreous material
Sea Glass
Silicon dioxide (mostly)
Blue-green chrysocolla rough specimen
Chrysocolla, hydrated copper aluminosilicate; commonly associated with malachite, quartz, and limonite
Quartz pebble (Quartztite fragment)
Silicon Dioxide (SiO2)
Stainless Steel (Polished)
Ferrous Alloy containing Iron (Fe), Chromium (Cr), and Carbon (C)
Onyx (Black) and Mother of Pearl Inlay
Silicon Dioxide (SiO2) for Onyx; Aragonite (CaCO3) for Mother of Pearl
Cobalt Blue Glass / Cullet Glass
Silicon dioxide (Amorphous man-made glass)
Chert (Arrowheads)
Microcrystalline Quartz (SiO2)
Exposed Aggregate Concrete (Pea Gravel)
Concrete with Siliceous Alluvial Gravels
Concrete Fragment
Hardened Portland cement and mineral aggregate
Turquoise cabochon ring
Turquoise — hydrated copper aluminum phosphate, CuAl₆(PO₄)₄(OH)₈·4H₂O
Opalite
Synthetic Opalite Glass / Opalized Glass
Asphalt Concrete
Bituminous conglomerate
Cullet Glass (Slag Glass)
Amorphous Silicon Dioxide (SiO2) with metallic oxide impurities
Slag (Industrial Byproduct)
Artificial silicate/iron byproduct
Mystic Topaz (Treated Quartz or Topaz)
Aluminum silicate fluoride hydroxide [Al2SiO4(F,OH)2] with thin-film metallic coating
Sandstone Concretion
Limonitic Sandstone Concretion
Green Obsidian Sphere (man-made glass)
Vitreous Silica with Chromium/Iron additives
Transit Token (RTD Denver)
Nickel-plated brass or bronze alloy (Cu-Sn-Zn-Ni)