Sandstone Concretion
Septarian or Carbonate-cemented Sandstone Concretion
Category
Browse man made composite (lithified equivalent of sedimentary) specimens identified by the Rock Identifier community.
Sandstone Concretion
Septarian or Carbonate-cemented Sandstone Concretion
Asphalt (Bituminous pavement)
Bituminous concrete / Asphalt
Cobalt Blue Glass / Cullet Glass
Silicon dioxide (Amorphous man-made glass)
Mystic Topaz (Treated Quartz or Topaz)
Aluminum silicate fluoride hydroxide [Al2SiO4(F,OH)2] with thin-film metallic coating
Opalite
Synthetic Opalite Glass / Opalized Glass
Cullet Glass (Slag Glass)
Amorphous Silicon Dioxide (SiO2) with metallic oxide impurities
Slag (Industrial Byproduct)
Artificial silicate/iron byproduct
Titanium Coated Kyanite (Aura Kyanite)
Aluminosilicate (Al2SiO5) with a Titanium-Niobium vacuum-deposited coating
Boxwork or Septarian Concretion
Septarian nodule / Boxwork weathering
Sandstone Anvil / Nutting Stone
Quartzose Sandstone (Sedimentary Rock)
Sandstone (with concrete/human-made layer)
Clastic Sedimentary Rock (primarily Quartz/Feldspar grains)
Sea Glass
Man-made vitreous material
Crescent Pebble
Weathered Quartzite or Sandstone Fragment
Chert Concretion
Chert (Microcrystalline Quartz, SiO2)
Titanium-coated Metal Cube (Man-made Fidget Toy)
Titanium-anodized or electroplated alloy (e.g., Ti-coated Zinc or Aluminum)
Transit Token (RTD Denver)
Nickel-plated brass or bronze alloy (Cu-Sn-Zn-Ni)
Concrete Rubble with Aggregate
Hardened Portland Cement Paste with Coarse Aggregate
Tumbled Gabbro
Gabbro (Mafic intrusive igneous rock)
Aura Quartz (Titanium Quartz)
Titanium-coated Silicon Dioxide (SiO2 + Ti)
Concrete with Exposed Aggregate
Anthropogenic conglomerate (Concrete)
Opalite
Synthetic Glass (Silica-based)
Costume Jewelry with Synthetic Gemstones
Synthetic Cubic Zirconia and Glass (SiO2 / ZrO2)
Opaline Glass (Opalite)
Synthetic Silicon Dioxide Glass
Titanium Aura Quartz
Titanium bonded Silicon Dioxide (SiO2 + Ti)
Sea Glass
Man-made silicate glass weathering product
Green Obsidian Sphere (man-made glass)
Vitreous Silica with Chromium/Iron additives
Cullet Glass (Slag Glass)
Amorphous Silicon Dioxide (Industrial Man-made)
Basalt
Basalt
Slag
Metallurgical Slag
Brick fragment (Man-made material)
N/A (Fired clay)
Aura Quartz (specifically Titanium Aura Quartz)
Titanium-coated Silicon Dioxide (SiO2 + Ti Coating)
Chert Concretion (with typical hematite/limonite staining)
Sedimentary Concretion (SiO2 with FeO(OH)⋅nH2O)
Pyrite Concretion (Grapestone)
Iron Sulfide (FeS2) Concretion
Sandstone Concretion
Clastic Sedimentary Rock (primarily SiO2 with mineral cement)
Blue Goldstone
Auraventurine (Synthetic glass with cobalt and copper inclusions)
Sandstone (with man-made markings)
Arenite (composed primarily of Quartz, SiO2)
Opalite
Synthetic Glass (Simulated Opal)
Synthetic Resin / Plastic Figurine
Synthetic Polymer (Copolymer of Polyethylene or Resin)
Cullet Glass (Slag Glass)
Amorphous Silicon Dioxide (Industrial Byproduct)
Aura Quartz
Titanium or Gold bonded Silicon Dioxide (SiO2)
Titanium Aura Quartz
Titanium-coated Silicon Dioxide (SiO2)
Opalite
Synthetic Opalized Glass