Polished brown banded agate cabochon
Agate, a microcrystalline variety of silica (SiO₂), chiefly chalcedony
mineral
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.
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Tumbled carnelian/chalcedony
Microcrystalline quartz (SiO₂), likely iron-stained chalcedony
mineral
Tumbled banded agate (likely chalcedony)
Banded microcrystalline quartz, SiO₂; chalcedony variety
mineral
Jasper with Quartz inclusions
Silicon Dioxide (SiO2)
sedimentary
Tumbled agate or chalcedony pebble
Microcrystalline quartz (SiO₂), likely agate/chalcedony
mineral
Jasper Pebble
Microcrystalline Quartz (SiO2)
sedimentary
Mookaite Jasper
Siliceous sedimentary rock (variety of Jasper/Chert)
Sedimentary Rock
Jasper (specifically Chert/Ironstone)
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions
sedimentary
Tumbled jasper, likely picture jasper or brecciated jasper
Microcrystalline quartz (SiO₂), chiefly chalcedony with iron-oxide pigments
mineral
Jasper
Microcrystalline Quartz (SiO2)
mineral
Agate Bookend / Quartz Geode
Silicon Dioxide (SiO2)
mineral
Blue chalcedony cabochon (likely)
Chalcedony, microcrystalline SiO₂; possibly blue agate or common opal, which cannot be distinguished confidently from the image
mineral
Brown Jasper
Silicon Dioxide (SiO2)
sedimentary
Quartz Geode Fragment
Crystalline Silicon Dioxide (SiO2)
mineral
Polished pink banded agate
Microcrystalline quartz (chalcedony), SiO₂
mineral
Red jasper
Microcrystalline quartz (SiO₂), commonly colored by iron oxides
mineral
Ocean Jasper
Orbicular Jasper / Chalcedony (SiO2)
Mineral
Polished banded agate
Agate, a banded variety of chalcedony (microcrystalline SiO₂)
mineral
Tumbled jasper or chert
Microcrystalline quartz (SiO₂), likely jasper/chalcedony
mineral
Red jasper (likely polished/tumbled)
Microcrystalline quartz/chalcedony, SiO₂, colored mainly by iron oxides
mineral
Red jasper pebble
Jasper, microcrystalline quartz (SiO₂) colored mainly by iron oxides
mineral
Smoky quartz (possibly smoky quartz/chalcedony)
Quartz, silicon dioxide (SiO₂), likely natural smoky quartz with conchoidal fracture
mineral
Polished jasper pebble
Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored by iron oxides
mineral
Chert (likely chalcedony-rich flint)
Microcrystalline quartz, SiO₂ (quartz/chalcedony)
sedimentary
Red Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Carnelian (orange chalcedony), possibly fire agate
Microcrystalline quartz, SiO₂ (chalcedony variety)
gemstone
Red jasper (likely tumbled/polished chalcedony)
Jasper, an opaque variety of microcrystalline quartz (SiO₂)
mineral
Tumbled chalcedony or agate
Microcrystalline quartz (SiO₂), likely chalcedony with iron-oxide staining
mineral
Tumbled blue chalcedony or pale aquamarine-like quartz
Chalcedony (microcrystalline SiO₂), possibly blue quartz; visual identification is uncertain
mineral
Jasper (likely red/brown jasper pebble)
Microcrystalline quartz (SiO₂), an opaque variety of chalcedony; exact identification is uncertain from the photo
sedimentary
Tumbled amber-colored chalcedony (likely carnelian)
Quartz, microcrystalline SiO₂; orange variety commonly called carnelian
mineral
Jasper
Silicon dioxide (SiO2)
sedimentary
Tumbled banded blue agate
Chalcedony (microcrystalline quartz, SiO₂), variety agate
mineral
Carnelian
Carnelian (Chalcedony / Quartz variety, SiO2)
mineral
Chert (likely jasper/chalcedony-rich chert)
Microcrystalline quartz, SiO₂
sedimentary
Quartz (Milky or Cloudy)
Silicon Dioxide (SiO2)
mineral
Red jasper
Jasper, microcrystalline quartz (SiO₂) colored mainly by iron oxides
metamorphic
Polished red jasper pebble
Jasper, microcrystalline quartz (SiO₂) colored mainly by hematite/goethite
metamorphic
Black Onyx
Silicon Dioxide (SiO2)
mineral
Carnelian Agate
Silicon Dioxide (Chalcedony variety)
mineral
Chalcedony Pebble / Rough Agate
Silicon Dioxide (SiO2)
mineral
Polished brown jasper pebble
Jasper, microcrystalline quartz (SiO₂) with iron-oxide impurities
mineral