Chert (specifically Gray/Blue-Gray Chert)
Chert (SiO2)
Category
Browse anthropogenic (man made industrial byproduct) specimens identified by the Rock Identifier community.
Chert (specifically Gray/Blue-Gray Chert)
Chert (SiO2)
Glazed Ceramic Tile
Fused Silicate-Clay composite
Desert Rose (Baryte or Gypsum Rose)
Baryte (BaSO4) or Gypsum (CaSO4·2H2O)
Blue Goldstone
Aventurine glass (Synthetic borosilicate glass with cobalt and metallic inclusions)
Porcelain (Stoneware Ceramic)
Mullite / Silica-glass composite (Al6Si2O13)
Chert (Jasper/Flint variant)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chalcanthite (Likely Synthetic/Lab-Grown)
Hydrated copper(II) sulfate (CuSO4·5H2O)
Chalk
Calcium Carbonate (CaCO3)
Diamond (as set in a metal alloy ring)
Diamond (Pure Carbon, C)
South Korean 100 Won Coin (Cupronickel)
Cupronickel Alloy (75% Cu, 25% Ni)
Chert (Jasper/Flint variant)
Silicon Dioxide (SiO2)
Titanium Aura Quartz
Titanium-coated Silicon Dioxide (SiO2)
Green Banded Chert (Agate/Jasper)
Silicon Dioxide (SiO2) with trace impurities of Chlorite or Glauconite
Diamond
Carbon (C)
Titanium Coated Aura Quartz (Apple Aura Quartz)
Silicon Dioxide (SiO2) with Metallic Vapor Deposition Coating
Rough Diamond
Diamond (Pure Carbon: C)
Goldfish Cracker (Culinary Mimic)
Cibus aurum (Commonly composed of Enriched Wheat Flour and Cheddar Cheese)
US Penny
Cuprum (Copper: Cu) and Zincum (Zinc: Zn) Alloy
Faceted Glass (Costume Jewelry)
Amorphous Silicon Dioxide with colorants (Glass)
Goldstone (Synthetic Aventurescence Glass)
Cuprous Aventurescent Glass (Silicon Dioxide with Copper inclusions)
Synthetic Marbled Aggregate (Footwear Component)
Ethylene-vinyl acetate (Croslite™)
Porcelain (Kaolin-based)
Alumina silicate ceramic (composed primarily of Kaolinite: Al2Si2O5(OH)4)
Red Swirl Beads (Likely Resin or Glass, simulating Red Jasper or Agate)
N/A (for the beads as pictured); Red Jasper: SiO2 (Chert variety); Red Agate: SiO2 (Chalcedony variety)
Garnet Beads
Garnet Group (complex nesosilicates, e.g., Almandine Fe3Al2(SiO4)3)
Chalcedony (or a variety of Chalcedony, likely Agate or Jasper)
Chalcedony (SiO₂)
Clay (as a rock-forming material)
Clay minerals (e.g., Kaolinite group, Smectite group, Illite group, Chlorite group)
Smoky Quartz
Smoky Quartz (SiO2)
Chipped Glass/Plastic Fragment
Silicon dioxide (SiO2) for glass (amorphous) or various polymer compounds for plastic
Goldstone (Red)
Aventurine Glass
Blue Goldstone
Aventurine Glass (Silicon Dioxide with metal inclusions)
Green Aura Quartz (Titanium treated Kyanite or Quartz)
Silicon Dioxide (SiO2) or Aluminum Silicate (Al2SiO5) with Titanium/Metal Oxide coating
Basalt
Basalt
Blue Goldstone
Aventurine Glass
Quartz
Silicon dioxide (SiO₂)
Sea Glass (Frosted Glass)
Amorphous Silica (SiO2) with various metal oxide impurities
Metal Alloy (Jewelry)
Not a naturally occurring rock or mineral; likely a metal alloy for jewelry. Possible compositions include sterling silver (92.5% silver, 7.5% copper), or other silver/gold alloys.
Metallic Ornament / Jewelry
N/A - This is an artificial object, not a geological specimen.
Industrial Diamond (Bort or Boart)
Diamond (pure Carbon, C)
Calcite (commonly referred to as Orange Calcite or Honey Calcite given its color)
Calcite
Green Fluorite
Fluorite (Calcium Fluoride, CaF2)
Quartz (likely Milky Quartz)
Quartz (SiO₂ - Silicon Dioxide)
Sandstone
Arenite (composed primarily of Quartz: SiO2)