Agate
Silicon dioxide (Chalcedony), SiO2
sedimentary
Category
Mineral (Specifically A Variety Of Chalcedony, Which Is Microcrystalline Quartz)
Browse mineral (specifically a variety of chalcedony, which is microcrystalline quartz) specimens identified by the Rock Identifier community.
Learn about Mineral (Specifically A Variety Of Chalcedony, Which Is Microcrystalline Quartz) in the encyclopedia
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Polished banded agate (likely blue lace agate)
Chalcedony, microcrystalline SiO₂, with iron and other trace-element impurities
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Banded Agate (Tumbled)
Silicon Dioxide (SiO2)
mineral
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Dyed Agate / Quartz
Silicon Dioxide (SiO2) with artificial dye
mineral
Jasper (likely river-worn)
Silicon Dioxide (SiO2)
sedimentary
Jasper
Silicon dioxide (SiO2)
Mineral/Sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions
sedimentary
Agate (Carnelian / Chalcedony)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
mineral
Chalcedony (Agate Pebble)
Microcrystalline Quartz (SiO2)
sedimentary
Jasper (specifically Chert/Ironstone)
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions
sedimentary
Quartz (specifically Milky/White Quartz)
Silicon Dioxide (SiO2)
mineral
Polished brecciated jasper (likely orbicular/picture jasper)
Microcrystalline quartz/chalcedony (SiO₂) with iron-oxide staining and breccia fragments
mineral
Fancy Jasper
Cryptocrystalline Quartz (SiO2) with iron oxide inclusions
mineral
Flint with Chalk Cortex
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Blue Banded Agate (Dyed)
Silicon Dioxide (SiO2) - Chalcedony variety
mineral
Orange chalcedony (likely carnelian)
Microcrystalline quartz, SiO₂; iron-bearing chalcedony (carnelian)
gemstone
Carnelian/chalcedony rough
Microcrystalline quartz (SiO₂), iron-oxide-colored chalcedony
mineral
Carnelian (Chalcedony)
SiO2 (Silicon Dioxide - Microcrystalline Quartz)
mineral
Agate (Carnelian-Blue Agate mix)
Silicon Dioxide (SiO2)
mineral
Carnelian
Carnelian (Cryptocrystalline Quartz, SiO2)
mineral
Red Jasper
Quartz (Silicon Dioxide) with Hematite inclusions, SiO2
mineral
Agate (within host rock)
Agate (Quartz variety SiO2)
mineral
Tumbled jasper (likely brecciated or leopard jasper)
Microcrystalline quartz/chalcedony, SiO₂, with iron-oxide inclusions
mineral
Flint
Microcrystalline quartz (SiO2)
sedimentary
Banded chert (likely flint)
Microcrystalline quartz/chalcedony, SiO₂
sedimentary
Chert
Chert (Microcrystalline Quartz, SiO2)
sedimentary
Quartz (Chert/Chalcedony variety)
Silicon Dioxide (SiO2)
mineral
Yellow Jasper
Silicon Dioxide (SiO2) with high iron inclusion
sedimentary
Tumbled yellow-brown jasper
Jasper, microcrystalline quartz (SiO₂) with iron-oxide impurities
metamorphic
Jasper (brecciated or orbicular jasper)
Microcrystalline quartz/chalcedony (SiO₂), colored by iron oxides and other impurities
mineral
Chert (or possibly Flint)
SiO2 (Silicon Dioxide)
Sedimentary Rock
Agate
Silicon Dioxide (SiO2)
mineral
White Agate (Chalcedony)
Silicon Dioxide (SiO2)
mineral
Chert (often called Flint)
Chert (Microcrystalline or Cryptocrystalline Quartz, SiO2)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Agate Geode
Silicon Dioxide (SiO2) - Chalcedony variety
sedimentary
Likely brown jasper or iron-stained chert
Microcrystalline quartz (SiO₂), with iron-oxide inclusions
mineral
Agate (specifically Chalcedony/Banded Agate)
Silicon Dioxide (SiO2)
sedimentary
Agate
Silicon Dioxide (SiO2), microcrystalline variety of quartz
sedimentary
Banded Agate
Agate (Silicon Dioxide, SiO2)
mineral