Chert (Yellow variety / Jasper)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Category
Mineral (Specifically A Variety Of Chalcedony, Which Is A Cryptocrystalline Quartz)
Browse mineral (specifically a variety of chalcedony, which is a cryptocrystalline quartz) specimens identified by the Rock Identifier community.
Chert (Jasper/Flint variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Chert (White Chert)
Silicon Dioxide (SiO2)
sedimentary
Chalcedony (Agate Pebble)
Silicon Dioxide (SiO2)
mineral
Tiger's Eye (Multicolor/Variegated)
Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxides)
mineral
Citrine Quartz
Crystalline Silicon Dioxide (SiO2) with Ferric Iron impurities
mineral
Chert (specifically Tan/Gray Chert)
Microcrystalline quartz (SiO2)
sedimentary
Chert (specifically Flint or Jasper variant)
Microcrystalline or Cryptocrystalline Silicon Dioxide (SiO2)
sedimentary
Quartz (likely a weathered/tumbled piece)
Quartz (SiO₂)
Mineral
Chert (and Chalcedony/Agate mixture)
Microcrystalline Quartz (SiO2)
sedimentary
Rose Quartz
Silicon dioxide with traces of titanium, iron, or manganese (SiO2)
mineral
Jasper (Banded Jasper)
Silicon Dioxide (SiO2) with impurities
sedimentary
Green Aventurine
Aventurine (a variety of Quartz, SiO2)
mineral
Chert (Yellow Jasper)
Microcrystalline Quartz (SiO2)
sedimentary
Petrified Wood
Silicified Wood (primarily Quartz/Chalcedony, SiO2)
sedimentary
Quartz Pebble
Crystalline Silicon Dioxide (SiO2)
mineral
Buffalo Nickel (Indian Head Nickel)
Cupronickel (75% Copper, 25% Nickel)
mineral (processed alloy)
Chert (Septarian or Nodular variety)
Microcrystalline Quartz (SiO2)
sedimentary
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
Metamorphic Rock (variety of Quartz)
Chert (Nodular)
Chert (SiO2 - Microcrystalline Quartz)
sedimentary
Red Jasper (Polished)
Jasper (Iron-rich Microcrystalline Quartz, SiO2)
sedimentary
Red Jasper
Silicon Dioxide with Iron Oxide inclusions (SiO2 + Fe2O3)
Mineral (variety of Chalcedony/Quartz)
Brecciated Jasper
Silicon Dioxide (SiO2) with Hematite and Quartz inclusions
sedimentary
Picture Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Chert (Flint variety)
Silicon Dioxide (SiO2)
sedimentary
Blue Quartz
Quartz (SiO2) with inclusions
Mineral
Jasper Conglomerate (specifically Puddingstone)
Jasper Conglomerate (Siliceous sedimentary rock)
sedimentary
Chert (specifically Flint or Jasper variant)
Microcrystalline silica (SiO2)
sedimentary
Blue Quartz (Dumortierite Quartz)
Silicon Dioxide with Aluminum Borosilicate (SiO2 + AlAl6BSi3O18)
metamorphic
Quartz (Rock Crystal) with minor impurities
Quartz (SiO2)
Mineral
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2) with Limonite/Goethite
mineral
Quartz
Quartz (SiO2)
Mineral
Clear Quartz (Rock Crystal Fragments)
Silicon Dioxide (SiO2)
mineral
Yellow Quartz Pebble
Quartz (Silicon Dioxide - SiO2)
mineral
Quartz
Silicon dioxide (SiO2)
Mineral
Chert
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Peach Moonstone
Orthoclase Feldspar (KAlSi3O8)
mineral
Chert (specifically Gray/Black Chert)
Chert (Microcrystalline or Cryptocrystalline Quartz, SiO2)
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
sedimentary
Citrine Geode (or Druzy Citrine)
Silicon Dioxide (SiO₂) - a variety of Quartz
Mineral