Chert (Flint)
Microcrystalline 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.
Learn about Mineral (Specifically A Variety Of Chalcedony, Which Is A Microcrystalline Quartz) in the encyclopedia
View all →
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Tumbled pale quartz/chalcedony fragment
Quartz (SiO₂), possibly microcrystalline chalcedony
mineral
Blue Agate
Chalcedony (SiO2)
mineral
Polished brown-green jasper
Jasper, microcrystalline quartz (SiO₂), commonly with iron-oxide and chlorite inclusions
mineral
Polished yellow jasper
Jasper, microcrystalline quartz (SiO₂), commonly containing iron oxides and other silicates
mineral
Tumbled chalcedony (likely agate or jasper)
Microcrystalline quartz, SiO₂ (chalcedony)
mineral
Carnelian
Carnelian (Silicon Dioxide, SiO2)
mineral
Tumbled agate/chalcedony
Microcrystalline quartz (SiO₂), likely banded chalcedony or agate
mineral
Jasper (likely brecciated or chalcedony-rich jasper)
Microcrystalline quartz/chalcedony, SiO₂, with iron-oxide impurities
sedimentary
Tumbled red jasper
Microcrystalline quartz (SiO₂), commonly colored by iron oxides
mineral
Blue Agate (Dyed or Treated Chalcedony)
Silicon Dioxide (SiO2), microcrystalline quartz variety
mineral
Chert (Chalcedony/Agate variety)
Microcrystalline Quartz (SiO2)
sedimentary
Flint Pebble
SiO2 (Microcrystalline Quartz / Chalcedony)
sedimentary
Tumbled orange chalcedony or carnelian
Microcrystalline quartz, SiO₂; orange variety commonly called carnelian
gemstone
Red Jasper
Microcrystalline Quartz (Chalcedony), SiO2 with iron oxide inclusions
sedimentary
Banded Agate / Lace Agate
Agate (Silica/Quartz) - SiO2
mineral
Tumbled yellow jasper or chalcedony
Microcrystalline quartz, SiO₂; likely iron-oxide-bearing jasper/chalcedony
mineral
Red jasper (likely polished/chipped fragment)
Jasper, microcrystalline quartz (SiO₂) colored mainly by iron oxides
mineral
Blue Lace Agate
Silicon Dioxide (SiO2)
mineral
Polished banded agate
Banded chalcedony, microcrystalline quartz (SiO₂)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Blue Quartz
Quartz (Silicon Dioxide) with blue inclusions (SiO2)
mineral
Polished jasper pebble
Jasper, microcrystalline quartz (SiO₂) with iron-oxide inclusions
mineral
Jasper
Chalcedony (Microcrystalline Quartz) - SiO2
mineral
Tumbled orange-and-white jasper or brecciated chalcedony
Microcrystalline quartz (SiO₂), likely iron-oxide-stained jasper; exact variety cannot be confirmed from the image
mineral
Yellow jasper (likely iron-rich chert)
Microcrystalline quartz, SiO₂, colored by iron oxides/hydroxides
sedimentary
Tumbled brown jasper
Microcrystalline quartz/chalcedony (SiO₂), iron-oxide colored
mineral
Red jasper (likely brecciated jasper)
Microcrystalline quartz, SiO₂, colored mainly by iron oxides
mineral
Polished red jasper
Jasper, opaque microcrystalline quartz (SiO₂) colored mainly by iron oxides
mineral
Agatized Jasper / Chalcedony
SiO2
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Plume Agate
Cryptocrystalline Quartz (SiO2)
Mineral/Gemstone
Tumbled chalcedony (likely milky agate)
Microcrystalline quartz, SiO₂; chalcedony/agate variety
mineral
Polished banded agate
Microcrystalline quartz (chalcedony), SiO₂
mineral
Agate (specifically Carnelian or Honey Agate)
Silicon Dioxide (SiO2)
Mineral
Ocean Jasper or Orbicular Jasper
SiO2
mineral
Green Jasper
Jasper (variety of Microcrystalline Quartz, SiO2)
sedimentary