Tumbled brown pebble
Indeterminate; likely quartz-rich sandstone or chert
Category
Browse sedimentary (if natural jasper) or artificial (if slag) specimens identified by the Rock Identifier community.
Tumbled brown pebble
Indeterminate; likely quartz-rich sandstone or chert
Green Jasper
Microcrystalline Quartz (SiO2)
Chert (Jasper)
Silicon Dioxide (SiO2)
Chert (Jasper)
Microcrystalline Quartz (SiO2) with hematite impurities
Chert (Jasper)
Microcrystalline Quartz (SiO2)
Chert (or Flint)
SiO2 (Microcrystalline Quartz)
Sandstone
Arenite
Sandstone
Arenite (SiO2 based typically)
Sandstone
Sandstone (composed predominantly of Quartz, SiO2)
Limonite (Iron Ore)
Limonite (Hydrous iron(III) oxide-hydroxide mixture, primarily FeO(OH)·nH2O)
Yellow Ochre / Limonite
Hydrated ferric oxide (FeO(OH)·nH2O)
Red Jasper
Silicon Dioxide with Hematite impurities (SiO2 + Fe2O3)
Snakeskin Agate
Agate (Cryptocrystalline Quartz, SiO2)
Green Aventurine
Silicon Dioxide (Quartz with Fuchsite inclusions), SiO2
Hag Stone (Chert/Flint with natural perforation)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Hag Stone
Porous Quartz or Chert Pebble (SiO2)
Hag Stone (Banded Chert or Limestone with Borehole)
Microcrystalline Quartz (Chert) or Calciferous Siltstone (CaCO3/SiO2)
Conglomeratic sandstone or breccia
Lithic arkose / polymictic conglomeratic sandstone
Chert / Jasper Pebble
Microcrystalline Quartz (SiO2)
Chert
Sedimentary Cryptocrystalline Quartz (SiO2)
Leopard Skin Jasper
Silicon Dioxide (SiO2) with impurities
Blue Kyanite
Kyanite (Al2SiO5)
Red Jasper
Microcrystalline quartz (SiO2)
Red Jasper
SiO2 (Silicon Dioxide with Iron Oxide inclusions)
Red Jasper
Silicon Dioxide (SiO2 with Fe2O3 inclusions)
Green Jasper
Microcrystalline Quartz (SiO2)
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
Bumblebee Jasper
Travertine (Calcite/Aragonite) with Realgar, Pyrite, and Volcanic Ash
Red Jasper
Silicon Dioxide with Hematite inclusions (SiO2 + Fe2O3)
Chert / Jasper
Silicon Dioxide (SiO2)
Chert / Jasper
Silicon Dioxide (SiO2)
Kambaba Jasper
Stromatolite (Microbial mat fossil in silicified sediment)
Green Jasper
Silicon Dioxide (SiO2) with impurities
Jasper (Chert)
Silicon Dioxide (SiO2)
Magnetite (Iron Ore)
Magnetite (Fe3O4)
Brecciated Jasper
Silicon Dioxide (SiO2) with mineral impurities
Red Jasper
Silicon Dioxide (SiO2) with Iron Oxide inclusions
Chert (Green variety)
Silicon Dioxide (SiO2)
Yellow Jasper
Silicon Dioxide (SiO2) with iron inclusions
Limonite/Hematite Ironstone
Goethite-rich Ironstone (FeO(OH) · nH2O)
Smoky Quartz (Herkimer-style)
Silicon Dioxide (SiO2)
Glauconitic Sandstone
Glauconitic Sandstone (Greensand)