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 …

Apr 23, 2023 · 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 …

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 …

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 …

Chert is a hard, fine-grained sedimentary rock composed almost entirely of silica (SiO₂) in the form of microcrystalline or cryptocrystalline quartz. Known for its durability, waxy or dull luster, …

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, …

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 …

Nov 6, 2019 · Chert is the name for a widespread type of sedimentary rock that is made of silica (silicon dioxide or SiO 2). The most familiar silica mineral is quartz in microscopic or even …

Jan 8, 2020 · Chert is widespread, but not widely known by the public as a distinct rock type. Chert has four diagnostic features: the waxy luster, a conchoidal (shell-shaped) fracture of the …

Siliceous precursor rocks of comparable texture that are primarily made of opal-A or opal-CT are sometimes also called chert, but usually with the addition of the dominant silica phase, for …