Red Jasper
Silicon Dioxide (SiO2) with Hematite (Fe2O3)
Category
Browse sedimentary (man made) specimens identified by the Rock Identifier community.
Red Jasper
Silicon Dioxide (SiO2) with Hematite (Fe2O3)
Chert (often called Flint or River Stone)
Microcrystalline alpha-quartz (SiO2)
Ferruginous Sandstone (Ironstone)
Clastic Sedimentary Rock (composed of SiO2 with Fe2O3/FeO(OH) cement)
Chert Arrowhead
Cryptocrystalline Quartz (SiO2)
Chert (specifically Flint)
Chert (SiO2)
Blue Goldstone
Synthetic glass with copper or cobalt/manganese inclusions
Blue Goldstone
Synthetic Aventurescent Glass (Cobalt-doped soda-lime glass)
Blue Goldstone
Aventurine glass (Synthetic borosilicate glass with cobalt and metallic inclusions)
Green Glass Slag
Amorphous Silicon Dioxide (SiO2) with metal oxide impurities
Porcelain (Stoneware Ceramic)
Mullite / Silica-glass composite (Al6Si2O13)
Glass Nugget (Tumbled Glass)
Amorphous Silicon Dioxide (SiO2) with additives
Goldstone (Brown)
Aventurine glass
Coquina
Bioclastic Limestone (composed primarily of CaCO3)
Fossiliferous Limestone
Biogenic Limestone (Calcium Carbonate, CaCO3)
Blue Chalcedony
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Chert (Jasper variety)
Silicon Dioxide (SiO2)
Chert (Flint)
Microcrystalline Silica (SiO2)
Fossilized Coral (Coquina/Limestone)
Cnidaria Anthozoa (Fossilized)
Chalcedony (Common Opal or Agate variant)
Silicon dioxide (SiO2) with trace hydration
Jasper
Silicon dioxide (SiO2) with impurities
Chert (often called Flint)
Chert (Microcrystalline or cryptocrystalline Silica, SiO2)
Chert / Flint
Cryptocrystalline quartz (SiO2)
Chert (Flint)
Microcrystalline Quartz (SiO2)
Chert (specifically Jasper or Flint)
Cryptocrystalline Quartz (SiO2)
Chert (Jasper variation)
Microcrystalline Quartz (SiO2)
Coquina
Bioclastic Limestone (Coquina)
Chert (varieties include Flint and Jasper)
Silicon Dioxide (SiO2)
Chalk
Calcium carbonate (CaCO3)
Chert (Flint)
Microcrystalline Quartz (SiO2)
Chalk
Calcium Carbonate (CaCO3)
Belemnoit (Fossil)
Belemnoidea (Order), Rostrum / Guard
Chert (often called Flint in archaeological contexts)
Silicon Dioxide (SiO2)
Chert
Microcrystalline Quartz (SiO2)
Chert (Polished River Pebble)
Chert (SiO2)
Chert (Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert (Yellow Jasper/Flint pebble)
Microcrystalline Quartz (SiO2)
Red Sandstone
Arenite (with Iron Oxide / Hematite staining)
Slate
Metamorphic Pelitic Rock
Turquoise
Hydrated phosphate of copper and aluminium: CuAl6(PO4)4(OH)8·4H2O
Chert / Flint
Silicon Dioxide (SiO2)
Chert (varieties: Flint or Jasper)
Silicon dioxide (SiO2) / Microcrystalline Quartz
Siltstone Pebble
Siltstone (composed of microscopic quartz and clay minerals)