Blue Sea Glass
Amorphous Silica (Anthropogenic glass)
not a rock (man-made origin)
Category
Man Made Alloy (Metallic)
Browse man made alloy (metallic) specimens identified by the Rock Identifier community.
Learn about Man Made Alloy (Metallic) in the encyclopedia
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Hematite
Iron(III) oxide (Fe2O3)
mineral
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (varieties: Flint or Jasper)
Silicon dioxide (SiO2) / Microcrystalline Quartz
sedimentary
Polished Hematite Tower
Hematite (Fe2O3)
mineral
Sea Glass
Amorphous silicon dioxide (glass)
mineral
Magnetite / Hematite mix
Magnetite (Fe3O4) and Hematite (Fe2O3)
mineral
Chert
Chert (Microcrystalline Quartz)
sedimentary
Quartzite pebble
Quartzite (SiO2)
metamorphic
Chert
Silicon dioxide (SiO2)
Sedimentary
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Quartzite
Metamorphic Quartz Sandstone
metamorphic
Sandstone Pebble
Ferruginous Sandstone (SiO2 with Fe2O3)
sedimentary
Aura Amethyst (Dyed/Coated)
Titanium-treated Silicon Dioxide (SiO2)
mineral
Gold Ore
Native Gold (Au) in Quartz or Silicate matrix
mineral
Magnetite / Hematite mix (Iron Ore)
Fe3O4 (Magnetite) / Fe2O3 (Hematite)
mineral
Specular Hematite
Specularite (Fe2O3)
mineral
Sea Glass
Amorphous Silica (Glass) SiO2
Mineraloid (Man-made origin)
Clay Brick
Ceramic structural unit (Al2O3·2SiO2·2H2O as precursor)
metamorphic (man-made/anthropogenic)
Synthetic Costume Accessory (Non-Geological)
Polyester and Acrylic Fiber (Anthropogenic polymer)
Synthetic / Man-made textile
Sea Glass (Cobalt Blue)
Amorphous Silica (Glass with Cobalt additives)
Anthropogenic specimen (man-made)
Artificial Rock Face (Faux Rock)
Glass Fiber Reinforced Concrete (GFRC)
man-made/construction material
Synthetic Marbled Aggregate (Footwear Component)
Ethylene-vinyl acetate (Croslite™)
not a rock (man-made polymer)
Porcelain (Kaolin-based)
Alumina silicate ceramic (composed primarily of Kaolinite: Al2Si2O5(OH)4)
metamorphic (man-made/engineered)
Blue Slag Glass
Ferro-silicate glass (Slag)
igneous (man-made/industrial)
Asphalt (Bituminous Concrete)
Composite material (bitumen binder with mineral aggregate)
man-made rock (technosol)
Granite
Intrusive Igneous Rock (Granitic)
igneous
Sandstone
Arenite (with iron oxide cement)
sedimentary
Chert (Cherty Shale / Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Asphalt aggregate (crushed stone in bitumen)
Artificial composite; predominantly crushed granite, basalt, limestone, and/or recycled aggregate bound by bitumen
sedimentary
Sandstone (Quartzose)
Arenite (composed primarily of SiO2)
sedimentary
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Granite
Phaneritic Felsic Igneous Rock
igneous
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone
Arenite
sedimentary
Granite
Granite (Phaneritic Quartz-Feldspar intrusive rock)
Igneous
Polished Hematite Tower
Hematite (Fe2O3)
mineral
Tumbled chalcedony (likely moss or dendritic agate)
Microcrystalline quartz, SiO₂, with iron-oxide inclusions
mineral
Quartzite
Metamorphic Quartzite
metamorphic
Green Quartzite
Metamorphic Quartz Sandstone (SiO2)
metamorphic
Red Quartzite
Quartzite (Metamorphosed Quartz Arenite)
metamorphic
Diamond
Carbon (C)
gemstone