Capital Management

From Yale University Art Gallery. Chert is picked visually. Chert is a very hard material and breaks with a conchoidal fracture, often producing very sharp edges. Weathered chert appears chalky or earthy and porous with a dull texture. Chert is a hard and compact sedimentary rock, consisting dominantly of very small quartz crystals. Chert, or cryptocrystalline quartz, is a microcrystalline variety of the mineral quartz (SiO 2) that is chemically or biochemically precipitated from seawater.Chert is just one of the many types, or polymorphs, of quartz, a mineral composed of three-dimensionally bonded silicate tetrahedra. Chert is widespread, but not widely known by the public as a distinct rock type. The chert is used as a road building material for county road projects and is sold to the general public. CHERT (SiO 2) - a precipitate of silica. A type of quartz called microcrystalline quartz, chert (and flint, a dark type of chert) seems to have been used both for everyday uses and for ritual uses. Both terms are more often used very broadly. Chert breaks into rounded surfaces with sharp edges. Others use the term "flint" for nodules and "chert" for large bodies of rocks. Uses. Early people took advantage of how chert breaks and used it to fashion cutting tools and weapons. Flint, chert, and jasper are a few of the many names used for microcrystalline quartz. Flint is a sedimentary cryptocrystalline form of the mineral quartz, categorized as the variety of chert that occurs in chalk or marly limestone. Chert has four diagnostic features: the waxy luster, a conchoidal (shell-shaped) fracture of the silica mineral chalcedony that composes it, a hardness of seven on the Mohs scale, and a smooth (non-clastic) sedimentary texture.Many types of chert fit into this categorization. It is a common rock type which occurs mostly in carbonate rocks either in nodular form or in layers (bedded chert).. Flint on the coast at Stevns Klint in Denmark. It occurs chiefly as nodules and masses in sedimentary rocks, such as chalks and limestones. Instead, their use is often based upon the background of the person speaking, the geologic occurrence of the material, the properties of the material, and any historic use … A Belizean blade with a point on each end that dates to 550 AD to 675 AD. It has many forms, including: FLINT, AGATE, JASPER, fossil wood and bone replacement. Some chert is possibly organic. There's apparently no clearly defined line that separates flint from chert and that people agree on. Unweathered chert appears hard, dense and brittle with a waxy or greasy texture. These names are not systematically used. There are several varieties of chert in Kentucky, Table 1 below describes a few of them. For instance, diatomite made of the silica shells of diatoms can be altered and turned to chert. A drilled stone pendant, gray chert, there is a little shell fossil exposed when the chert was chipped, something like that would have been very mysterious to people who did not know about fossils, likely dates to the Woodland to Mississippian Periods, ca.3000 - 500 B.P., North Florida: $65.00: #GLN26: 1 … Chert. Chert Chert is a rock of almost any color and is composed of glassy silicon and very fine-grained quartz. Flint was widely used historically to make stone tools and start fires. Thus, chert breaks in a predictable way; it is brittle enough to be readily shaped when struck with sufficient force; and it is hard enough to make durable tool. Since the revenues generated from the sale of chert do not cover all of the Chert Fund’s expenses, the General Fund must transfer funds to the Chert Fund to pay for normal operating expenses. Some authors use "chert" as the more general term, with flint being a dark variant.

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