Cobalt Glass Slug (Man-made Glass)
Amorphous Silica with Cobalt Oxide (SiO2 + CoO)
mineraloid
Category
Man Made Rock Like Material
Browse man made rock like material specimens identified by the Rock Identifier community.
Learn about Man Made Rock Like Material in the encyclopedia
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Blue Goldstone
Aventurine Glass (SiO2 with Cobalt/Copper inclusions)
man-made glass
Chert (Honey Chert / Flint)
Silicon Dioxide (SiO2)
sedimentary
Chert (Jasper/Flint)
Silicon Dioxide (SiO2)
sedimentary
Milky quartz (likely quartz crystal fragment)
Quartz, silicon dioxide (SiO₂)
mineral
Gemstone jewelry ensemble
Likely mixed gemstone and glass-bead jewelry; exact stones cannot be determined from the image
gemstone
Sea Glass (White/Clear)
Amorphous Silica (Alkali-Lime-Silica Glass), SiO2 + Na2O + CaO
Anthropogenic (Man-made product subject to geological processes)
Quartz crystal (likely clear quartz)
Quartz, silicon dioxide (SiO₂)
mineral
Polished gemstone tower assortment
Primarily quartz varieties and simulants; apparent amethyst (SiO₂), rose quartz (SiO₂), clear quartz (SiO₂), fluorite (CaF₂), sodalite, malachite, and possibly dyed or composite stones
gemstone
Chert (Grey-Green Flint)
Microcrystalline silicon dioxide (SiO2)
sedimentary
Chert (Flint/Jasper variety)
Microcrystalline Quartz (SiO2)
sedimentary
Asphalt (Bituminous Concrete)
Bituminous Concrete / Pavement
man-made (synthetic rock)
Chert (Nodular or Massive Variety)
Cryptocrystalline Quartz (SiO2)
sedimentary
Coquina
Bioclastic Limestone
sedimentary
Chert (Yellow Jasper/Flint)
Silicon Dioxide (SiO2)
sedimentary
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Chert
Microcrystalline Quartz (SiO2)
sedimentary
Polished stone sphere, possibly agate or jasper
Likely microcrystalline quartz (SiO₂); exact variety cannot be confirmed from the image
mineral
Sandstone
Arenite
sedimentary
Polished orbicular jasper
Jasper, microcrystalline quartz (SiO₂), with iron oxides and other inclusions
mineral
Chert (varietal: Flint/Jasper)
Silicon Dioxide (SiO2)
sedimentary
Granite
Intrusive Igneous Rock (Granitic)
igneous
Chert
Chert (Microcrystalline Quartz)
sedimentary
Diamond
Carbon (C)
gemstone
Chert
Silicon dioxide (SiO2)
Sedimentary
Clay Brick
Ceramic structural unit (Al2O3·2SiO2·2H2O as precursor)
metamorphic (man-made/anthropogenic)
Chert (specifically Flint or Common Chert node)
Silicon Dioxide (SiO2)
sedimentary
Aura Quartz
Titanium/Titanium-Gold treated Silicon Dioxide (SiO2)
mineral
Fossiliferous Limestone with Crinoid Stem
Sedimentary Rock with Crinoidea Fossil
fossil
Chert
Chert (SiO2)
sedimentary
Coquina
Biogenic Limestone (mostly Calcium Carbonate, CaCO3)
sedimentary
Sandstone (with potential Arkose/Lithic characteristics)
Arenite (Sedimentary rock composed of sand-sized grains)
sedimentary
Chert / Flint
Silicon Dioxide (SiO2)
sedimentary
Granite
Plutonic Igneous Rock (composed typically of SiO2, Al2O3, K2O, Na2O, CaO)
igneous
Hematite Beads
Hematite (Fe2O3)
Mineral
Asphalt aggregate (crushed stone in bitumen)
Artificial composite; predominantly crushed granite, basalt, limestone, and/or recycled aggregate bound by bitumen
sedimentary
Green sea glass (likely)
Anthropogenic glass, not a mineral; composition commonly soda–lime silicate glass
mineral
Polished silver sheen obsidian heart
Obsidian (volcanic glass), primarily rhyolitic silica-rich glass
igneous
Granite
Granite (composed primarily of Quartz, Feldspar, and Mica)
igneous
Quartzite
Metamorphic Quartzite (SiO2)
metamorphic
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (specifically Jasper or Flint)
Cryptocrystalline Quartz (SiO2)
sedimentary