Chert - Wikipedia Chert ( tʃ ɜːr t ) is a hard, fine-grained sedimentary rock composed of microcrystalline or cryptocrystalline quartz, [1] the mineral form of silicon dioxide (SiO 2) [2] Chert is characteristically of biological origin, but may also occur inorganically as a chemical precipitate or a diagenetic replacement, as in petrified wood [3]
Chert Rock | Types, Properties, Composition, Formation, Uses Chert is a fine-grained sedimentary rock composed of quartz (SiO2) that is microcrystalline or cryptocrystalline quartz It is usually organic rock but also occur inorganically as a chemical precipitate or a diagenetic replacement It occurs as nodules, concretionary masses, and as layered deposits
Chert: Sedimentary Rock - Pictures, Definition, Formation Chert is a sedimentary rock composed of microcrystalline or cryptocrystalline quartz, the mineral form of silicon dioxide (SiO 2) It occurs as nodules, concretionary masses, and as layered deposits Chert breaks with a conchoidal fracture, often producing very sharp edges
Chert: Identification, Pictures Info for Rockhounds Chert is a biochemical sedimentary rock made from microcrystalline quartz It is very hard – registering a 7 on the Mohs hardness scale, and displays conchoidal fracturing Chert can almost any color, but is usually gray, brown, red, or green It has many subvarieties including flint, jasper, agate, and onyx
Chert and flint | Mineral, Sedimentary Rock | Britannica chert and flint, very fine-grained quartz (q v ), a silica mineral with minor impurities Several varieties are included under the general term chert: jasper, chalcedony, agate (qq v ), flint, porcelanite, and novaculite Flint is gray to black and nearly opaque (translucent brown in thin splinters) because of included carbonaceous matter
Chert: Formation, Types, Uses, and Care for this Sedimentary Rock Explore the world of chert, a cryptocrystalline quartz rock valued for its historical significance in tool-making and its modern uses in construction, jewelry, and decorative arts Learn about its formation, types, and care in this comprehensive guide
All About the Rock Called Chert - ThoughtCo Chert is a sedimentary rock made of silica, mainly from the skeletons of tiny plankton This rock forms through slow transformations beginning with siliceous ooze going through lithification and diagenesis Chert is a tough rock that isn't transparent, often showing colors due to clay or organic matter
Flint, Chert, and Jasper: Names for Microcrystalline Quartz Flint, chert, and jasper are names commonly used by geologists and by the general public for opaque specimens of microcrystalline quartz The same hand specimen might be called "chert" by one person, "flint" by another, and "jasper" by a third
Chert: Mineral information, data and localities. - mindat. org Cherts are tough, compact rocks with low porosity that are composed mainly of microcrystalline quartz (<20 microns in diameter) and varying amounts of impurities (Folk et al 1952; Smith 1960)
How to Identify Chert – Geology In Accurately identifying chert involves assessing key physical properties—such as its hardness, fracture style, luster, and color—which differentiate it from rocks like limestone and help characterize its well-known varieties, including flint and jasper