Agate
Agate (Cryptocrystalline Variety of Quartz, SiO2)
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.
Learn about Mineral (Specifically A Variety Of Chalcedony, Which Is Microcrystalline Quartz) in the encyclopedia
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Peach Aventurine
Quartz variety (SiO2 + Hematite/Goethite inclusions)
mineral
Jasper
Silicon dioxide (SiO2)
sedimentary
Tumbled yellow chalcedony (probable)
Chalcedony, microcrystalline quartz (SiO₂), possibly iron-stained jasper
mineral
Quartz Geode (partially formed/chalcedony with iron staining)
Quartz (SiO2) with Chalcedony (cryptocrystalline quartz) and likely Iron Oxides/Hydroxides
Mineral/Sedimentary Rock Feature
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
mineralological
Polished carnelian
Carnelian, orange-red chalcedony (microcrystalline quartz, SiO₂)
mineral
Tumbled orange chalcedony
Chalcedony (microcrystalline quartz, SiO₂), likely orange carnelian
mineral
Polished agate pebble
Banded chalcedony, a microcrystalline variety of quartz (SiO₂)
mineral
Quartz (Agate/Chalcedony)
Silicon Dioxide (SiO2)
mineral
Yellow Agate
Chalcedony (cryptocrystalline Quartz), SiO2
mineral
Chrysoprase
SiO2
gemstone
Yellow Agate
Agate (Varietal form of Chalcedony/Quartz, SiO2)
mineral
Tumbled chalcedony (likely brown agate)
Chalcedony, microcrystalline quartz (SiO₂); possibly agate
mineral
Polished red jasper
Jasper, microcrystalline quartz (SiO₂), colored chiefly by iron oxides
metamorphic
Polished brecciated jasper
Silica-rich microcrystalline quartz/chalcedony (SiO₂), with iron-oxide staining and angular mineral fragments
metamorphic
Tumbled brown jasper
Microcrystalline quartz (SiO₂), commonly with iron-oxide impurities
mineral
Tumbled red-brown stone, likely jasper
Jasper, microcrystalline quartz (SiO₂), probably iron-oxide-bearing chert
mineral
Chalcedony (probably agate or common quartz)
Microcrystalline quartz, SiO₂
mineral
Polished brown jasper
Jasper, microcrystalline quartz (SiO₂), commonly containing iron-oxide and clay inclusions
mineral
Tumbled orange carnelian (likely)
Chalcedony, microcrystalline quartz (SiO₂)
gemstone
Carnelian (Chalcedony variety)
SiO2 (Silicon Dioxide)
Mineral
Jasper with Agate Inclusions
Silicon Dioxide (SiO2) - variety of Quartz/Chert
sedimentary
Jasper (Red/Brown Variety)
Jasper (Silicon Dioxide, SiO2 plus Iron Oxide impurities)
sedimentary
Tumbled carnelian (red-orange chalcedony)
Carnelian, cryptocrystalline quartz (SiO₂), a variety of chalcedony
gemstone
Tumbled agate and chalcedony specimens
Microcrystalline quartz (SiO₂), chiefly chalcedony/agate
mineral
Agate (specifically a Banded Agate with a Quartz Druzy center)
Silicon Dioxide (SiO2)
mineral
Crazy Lace Agate
Chalcedony (Silicon Dioxide, SiO2)
mineral
Polished brecciated jasper pebble
Microcrystalline quartz (SiO₂), with iron-oxide inclusions
mineral
Tumbled carnelian (red-orange chalcedony)
Carnelian, a microcrystalline variety of quartz; SiO₂
gemstone
Tumbled carnelian
Carnelian, orange-red chalcedony (microcrystalline quartz, SiO₂)
gemstone
Blue chalcedony (likely dyed or coated)
Microcrystalline quartz, SiO₂ (chalcedony)
mineral
Tumbled blue chalcedony
Chalcedony, microcrystalline quartz (SiO₂)
mineral
Red Jasper (possibly banded Jaspilite)
Silicon Dioxide with Iron Oxide (SiO2 + Fe2O3)
sedimentary
Polished red jasper
Jasper, microcrystalline quartz (SiO₂)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Chalcedony (likely agate/chert fragment)
Microcrystalline quartz, SiO₂
mineral
Flint
SiO2 (Cryptocrystalline Quartz / Chert)
sedimentary
Polished agate/geode slab
Banded chalcedony (microcrystalline quartz, SiO₂), likely with quartz crystals
mineral
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide impurities
mineral
Chrysoprase
Chalcedony (Silicon Dioxide, SiO2)
mineral
Ocean Jasper
Orbicular Jasper/Microcrystalline Quartz (SiO2)
sedimentary