Chert (specifically Flint or Dark Chert)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Category
Mineral (Specifically A Variety Of Chalcedony, Which Is A Microcrystalline Quartz)
Browse mineral (specifically a variety of chalcedony, which is a microcrystalline quartz) specimens identified by the Rock Identifier community.
Sandstone Concretion
Moqui Marble / Ironstone Concretion (Iron oxide-cemented sandstone)
sedimentary
Banded Agate
Cryptocrystalline Quartz (SiO2)
mineral
Jasper and Quartz conglomerate (River Rock)
Silicon Dioxide (SiO2) - Chalcedony and Quartz variety
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with Goethite/Iron oxide inclusions
sedimentary
Dyed Agate Slice
Silicon Dioxide (SiO2) - variety of Chalcedony
mineral
Agate (Sliced Nodule)
Silicon Dioxide (SiO2) - Chalcedony variety
mineral
Chert (specifically Tan Chert)
Chert (SiO2)
sedimentary
Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
White Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Jasper
Silicon dioxide (SiO2) with impurities
sedimentary
Red Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Red Jasper
SiO2 (Silicon Dioxide with Iron Oxide inclusions)
sedimentary/mineral
Banded Agate (Onyx type)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Chert (varieties include Flint and Jasper)
Microcrystalline or Cryptocrystalline Silicon Dioxide (SiO2)
sedimentary
Banded Agate
Silicon dioxide (SiO2) - variety of Chalcedony
mineral
Bloodstone (also known as Heliotrope)
Silicon Dioxide (SiO2) - variety of Chalcedony
mineral
Jasper Agate
Silicon dioxide (SiO2)
mineral
Quartz Pebble (Chalcedony/Agate variety)
Silicon Dioxide (SiO2)
mineral
Jasper (Iron-rich)
Silicon Dioxide (SiO2) with Fe2O3 (Hematite) impurities
sedimentary
Jasper with Quartz Vein
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Chert (Jasper variation)
Microcrystalline Quartz (SiO2)
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
mineral
Red Jasper
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Agate
Silicon Dioxide (SiO2) - variety of Chalcedony
mineral
Tiger's Eye
Tiger's Eye (a variety of Chalcedony, which is cryptocrystalline quartz). Chemical Formula: SiO2 with inclusions of crocidolite fibers.
Mineral
Jasper (Banded Argillite/Chert mix)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Carnelian Agate
Silicon Dioxide (SiO2) - variety of Chalcedony
mineral
Ocean Jasper
Spherulitic Chalcedony (SiO2)
sedimentary
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Blue Lace Agate
Banded Chalcedony (SiO2)
mineral
Green Jasper (Heliotrope / Bloodstone variety)
Silicon Dioxide (SiO₂)
sedimentary
Jasper
Silicon Dioxide (SiO2)
sedimentary
Green Aventurine
Silicon Dioxide (Quartz variety) with Fuchsite inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)
metamorphic
Banded Calcite (often sold as 'Mexican Onyx' or 'Green Onyx')
Calcite (Calcium Carbonate, CaCO3)
sedimentary
Chert (Jasper)
Microcrystalline Quartz (SiO2) with iron oxide inclusions
sedimentary
Chert (Nodule)
Chert (Silicon Dioxide, SiO2)
sedimentary
Tumbled Purple Agate
Silicon Dioxide (SiO2) - Chalcedony variety
mineral
Jasper
Silicon Dioxide (SiO2) - Impure Variety of Chert
sedimentary
Tree Agate (Dendritic Agate)
Silicon Dioxide (SiO2) with Manganese/Iron inclusions
mineral
Citrine Quartz
Silicon Dioxide (SiO2)
mineral
Blue Lace Agate
Cryptocrystalline Quartz (SiO2) with trace minerals
sedimentary