Tiger's Eye
Silicon dioxide (SiO2) with fibrous inclusions of crocidolite
Mineral
Category
Mineral (Cryptocrystalline Quartz)
Browse mineral (cryptocrystalline quartz) specimens identified by the Rock Identifier community.
Learn about Mineral (Cryptocrystalline Quartz) in the encyclopedia
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Chrysoprase
Chalcedony (cryptocrystalline SiO2 variety)
Mineral
Chert Pebble with Quartz Veins
Microcrystalline Quartz (SiO2)
sedimentary
Agate (Chalcedony Nodule)
Silicon Dioxide (SiO2)
mineral
Brecciated Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Chert (and/or Flint)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary
Chert (specifically Flint or Jasper variant)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (with Iron Staining)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
White Jade / White Chalcedony
Nephrite Jade (Ca2(Mg,Fe)5Si8O22(OH)2) or Chalcedony (SiO2)
Mineral
Polished pink chalcedony (likely pink agate/geode)
Microcrystalline quartz, SiO₂; chalcedony with iron-bearing inclusions and possible druzy quartz
mineral
Ferruginous Quartz (Red Jasper/Carnelian Agate)
Silicon Dioxide (SiO2) with Iron Oxide inclusions
mineral
Blue Chalcedony
Silicon Dioxide (SiO2)
mineral
Chert
Microcrystalline Quartz (SiO2)
sedimentary
Banded Sandstone / Quartzite with Mineral Veins
Sedimentary rock (Quartz arenite with iron oxide/silica banding)
sedimentary
Jasper
Silicon Dioxide (Microcrystalline Quartz, SiO2)
sedimentary
Polished carnelian/chalcedony
Carnelian, a reddish-orange variety of microcrystalline quartz (SiO₂)
mineral
Chrysocolla
Hydrated copper silicate (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral
Red Jasper
Microcrystalline quartz (SiO2)
sedimentary
Yellow Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Tumbled white chalcedony (likely milky quartz)
Chalcedony, microcrystalline SiO₂; possibly milky quartz
mineral
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Yellow Jasper
Silicon Dioxide with Limonite/Goethite inclusions (SiO2)
sedimentary
Chalcedony Geode
Chalcedony (SiO2) within a geode structure
Mineral Geode/Sedimentary or Volcanic related
Banded Agate
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
sedimentary
Banded Agate (specifically Carnelian Agate slice)
Chalcedony (cryptocrystalline variety of Quartz), SiO2
mineral
Chert (Flint/Jasper variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (and Jasper/Flint variant)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Nodule)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Flint Pebbles)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert with Quartz Veins
Microcrystalline Quartz (SiO2)
sedimentary
Leopard Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Quartz Vein Rock
Silicon Dioxide (SiO2)
mineral
Chalcedony (Fire Agate or Carnelian variety)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Banded Agate (specifically Botswana or Apricot Agate)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Dyed Agate Slice
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Banded Agate
Agate (Cryptocrystalline variety of Quartz, SiO2)
mineral
Agate
Chalcedony (Cryptocrystalline variety of Quartz, SiO2)
mineral
Agate (specifically, a slice of a Blue Lace or Chalcedony Agate nodule)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Blue Chalcedony (likely dyed)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Agate
Chalcedony (cryptocrystalline variety of Quartz, SiO2)
mineral
Blue Chalcedony
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Lake Superior Agate
Cryptocrystalline Quartz (SiO2) with Iron impurities
mineral