Aura Quartz (Titanium/Gold coated)
Silicon Dioxide (SiO2) with metallic vapor deposition
mineral
Category
Anthropogenic Material (Man Made Rock)
Browse anthropogenic material (man made rock) specimens identified by the Rock Identifier community.
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Blue slag glass or dyed glass-like industrial material
Amorphous silicate glass; likely copper-bearing blue slag, but possibly colored man-made glass
mineral
Cubic Zirconia (Simulated Diamond)
Cubic Zirconia (ZrO2)
mineral
Opalite
Synthetic Opalite Glass (Silicon Dioxide)
mineraloid (man-made)
Slag
Anthropogenic Iron Silicate Glass
mineral
Opalite
Synthetic Glass, SiO2 base with metallic inclusions
mineraloid (synthetic)
Obsidian Arrowhead
Obsidian (Volcanic Glass)
igneous
Basalt
Basalt (Mafic volcanic rock)
igneous
Sandstone
Arenite
sedimentary
Sandstone (with iron staining)
Quartz Arenite / Ferruginous Sandstone
sedimentary
Sandstone
Sandstone (composed predominantly of Quartz, SiO2, with Feldspar and Clay minerals)
sedimentary
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Chert (Arrowhead/Tool variety)
Microcrystalline Quartz (SiO2)
sedimentary
N/A - Man-made object (Jewelry Chain)
Antiqued or Oxidized Metal Chain (often Steel or Brass)
Mineral (processed metal)
Black Obsidian
Amorphous volcanic glass (SiO2 + impurities)
igneous
Ferrochrome Slag
Anthropogenic silicate/oxide glass (Complex silicate matrix with Cr-Fe-Si inclusions)
Industrial byproduct (often confused with igneous rocks or meteorites)
Sandstone (likely Quartzose Sandstone)
Arenite
sedimentary
Sandstone
Clastic sedimentary rock (Quartz arenite/Arkose)
sedimentary
Man-made Crystal (Lead Glass)
Lead oxide-doped Silica Glass (approx. SiO2 + PbO)
Mineraloid/Synthetic Material
Red Sandstone
Arenite (Fe2O3 enriched)
sedimentary
Tektite
Natural impact glass
meteorite
Basalt
Basalt (Mafic Extrusive Igneous Rock)
igneous
Sandstone (likely Fossiliferous)
Arenite / Fossiliferous Sandstone (SiO2 composition)
sedimentary
Titanium Amethyst Geode
Silicon Dioxide (SiO2) with Titanium/Metal Vapor Deposition Layer
mineral
Aura Quartz
Titanium/Titanium-Gold treated Silicon Dioxide (SiO2)
mineral
Opalite
Synthetic Opalised Glass
mineraloid (synthetic)
Quartzite
Metamorphic quartz rock (SiO2)
metamorphic
Flint
Silicon dioxide (SiO2)
sedimentary
Blue Goldstone
Man-made glass with suspended copper, cobalt, or manganese particles
man-made glass
Iron Slag
Anthropogenic Vitreous Ferrous Silicate
industrial byproduct (anthropogenic)
Fulgarite
Fulgurite (Lechatelierite / Vitrified Sand)
igneous
Chalk
Carbonate rock (mainly CaCO3)
sedimentary
Chert Arrowhead
Microcrystalline Quartz (SiO2)
sedimentary
Goldstone (Red/Brown)
Aventurine Glass (SiO2 with Copper inclusions)
Mineral (Man-made glass)
Sandstone
Arenite
sedimentary
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Cullet Glass (sometimes mistaken for Blue Obsidian or Slag)
Amorphous Silicon Dioxide (SiO2) with chemical additives (e.g., Cobalt for blue color)
mineraloid / industrial byproduct
Green Glass (often marketed as 'Obsidian' or 'Green Quartz')
Amorphous Silica (SiO2) with copper or chromium additives
Mineraloid (Man-made)
Chert (varietal Chalcedony or Flint)
Silicon dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Asphalt (Bituminous Concrete)
Composite material (bitumen binder with mineral aggregate)
man-made rock (technosol)
Greenstone
Metamorphic mafic rock (chlorite-actinolite-epidote schist)
metamorphic
River Pebbles (Chert and Quartzite)
Sedimentary Clastic Rock (Silica-rich)
sedimentary