Chert (Jasper variety)
Chert (SiO2)
sedimentary
Category
Mineral, Often A Rock Given Its Aggregate Nature
Browse mineral, often a rock given its aggregate nature specimens identified by the Rock Identifier community.
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Milky Quartz
Silicon Dioxide (SiO2)
mineral
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
River Stone (Greywacke)
Greywacke (immature sandstone)
sedimentary
Red Jasper
Jasper (Silicon Dioxide, SiO2 with Fe2O3 inclusions)
mineral
River Rock (likely Basalt or Greywacke)
Basalt or Lithic Sandstone
Igneous or Sedimentary (water-worn)
Agate (Dyed) or composite stone
SiO2
mineral
River Stone (Basalt Porphyry)
Porphyritic Basalt
igneous
Quartzite River Rock
Quartzite (primarily SiO2)
metamorphic
Prehnite
Prehnite, Ca2Al2Si3O10(OH)2
Mineral
Jade (Nephrite or Jadeite)
Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2) or Jadeite (Na(Al,Fe3+)Si2O6)
Metamorphic Rock / Mineral
Pink Tourmaline (Rubellite)
Elbaite (Na(Li,Al)3Al6(BO3)3Si6O18(OH)4)
mineral
Dyed Agate
Silicon Dioxide (SiO2)
mineral
Yellow Jasper
Silicon Dioxide (SiO2)
sedimentary
Conglomerate (Puddingstone)
Conglomerate (specifically, clastic sedimentary rock)
Sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Quartzite
Metamorphic Quartzite (primarily SiO2)
metamorphic
Pyrite in Host Rock
Iron Disulfide (FeS2)
mineral
Jasper
Jasper (Silicified microcrystalline quartz) - SiO2
sedimentary
Basalt
Extrusive igneous rock
igneous
Halite (Rock Salt)
Halite; NaCl (Sodium Chloride)
Mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Greenstone or Chlorite Schist
Greenschist / Chlorite schist
metamorphic
Sandstone (Ferruginous)
Sandstone (SiO2 with iron oxide impurities)
sedimentary
Yellow Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Quartzite (River Pebble)
Metamorphosed Quartz-rich Sandstone (SiO2)
metamorphic
Exposed Aggregate Concrete (Pea Gravel)
Concrete with Siliceous Alluvial Gravels
sedimentary (man-made conglomerate)
Picture Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Picture Jasper
Silicon Dioxide (SiO2)
sedimentary
Shale
Shale
sedimentary
Yellow Jasper
Silicon Dioxide with Limonite/Goethite inclusions (SiO2)
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with hydrated iron oxide impurities (Goethite)
Mineral-based Sedimentary/Silica
Turquoise
Turquoise - CuAl6(PO4)4(OH)8·4H2O
gemstone
Jasper
Silicon dioxide (Microcrystalline quartz, SiO2)
sedimentary
Dyed Agate Slice
Silicon Dioxide (SiO2) with artificial colorants
Mineral (variety of Chalcedony)
Jasper / Chert (river tumbled)
Microcrystalline Quartz (SiO2)
sedimentary
Banded Agate (Agate Slice)
Silicon Dioxide (SiO2) - Variety of Chalcedony
mineral
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Greenschist with Quartz Veining
Greenschist (commonly containing Chlorite, Actinolite, and Epidote)
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Druzy on Agate (River Cobble)
Silicon Dioxide (SiO2)
Mineral / Sedimentary (often associated with volcanic hosts)
Wishing Stone with Quartz Vein
Hydrothermal Quartz Vein in Metasedimentary Matrix (primarily SiO2)
metamorphic