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Congo diamond
| Diamond Glossary (алмазы и бриллианты - глоссарий терминологии) |
Congos
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Congo, английский
Гос-во конго,
Congo boart, английский
Congo bort, английский
Congos used industrially as bort. see bort, congos.
Congo rounds, английский
Spherical- or near-spherical-shaped congos. see congos.
Congo, democratic republic of the, английский
French (official), lingala (a lingua franca trade language), kingwana (a dialect of kiswahili or swahili), kikongo, tshiluba
Congo, republic of the, английский
French (official), lingala and monokutuba (lingua franca trade languages), many local languages and dialects (of which kikongo is the most widespread)
Congobort, английский
Congos, английский
- Originally and commonly used as a name for a variety of diamonds found in the belgian congo diamond district in africa and more recently as a descriptive term applied to all diamonds having the appearance and characteristics of those produced in the belgian congo. congos are white to gray-green and yellow, drusy-surfaced, opaque-to-somewhat-translucent diamonds, having shapes corresponding to the many forms characteristic of the isometric (cubic) crystal system. at one time, congos were considered fit only for use in fragmented form, but a considerable number are now used as toolstones and drill diamonds. see diamond.
- Sometimes designates drill diamonds ranging from 1 to 8 stones per carat in size.
Diamond, английский
- Брильянт - конфигурация головы и плеч, в которой воротник “разорван”, поэтому конфигурация имеет ромбовидный вид;
- Mineral composed essentially of carbon crystallized at extremely high temperatures and pressures; in nature, diamonds form 150 to 200km (93 to 124 miles) or more below the earth`s surface. diamond is the hardest of all known natural substances (10 on the mohs scale); its refractive index is 2.417, dispersion 0.044, specific gravity 3.52, and its lustre is adamantine. diamond ranges from colourless to yellow, brown, gray, orange, green, blue, white, black, purple, pink and extremely rarely, red. transparent and near-colourless is a desirable colour, diamond is a highly valued gemstone.
- A diamond is a precious gem, comprised of a crystalline form of pure carbon, the hardest naturally occurring substance.
- The hardest known substance composed of carbon crystallized in the isometric system, the more common crystal forms being the octahedron and rhombic dodecahedron. the cube and some com¬plex and combination forms of the isometric system are found, as well as rounded, distorted, twinned, and cryptocrystalline forms. although very hard, diamond has excellent cleavage and breaks readily under a blow, yielding flat surfaces parallel to the octahedral planes. diamonds usually are classified as either "gems" or "industrials" on the basis of color, shape, size, crystal form, and the size and location of inclusions or other imperfections. dia¬monds sometimes also are classified on a geographical basis, such as angolas, brazilians, congos, sierra leones, or west africans. this does not strictly mean that diamonds so classed come from that specific geographical area but that they are similar to stones characteristically produced by mines in that locality. a method for synthesizing diamonds has been developed, and small industrial diamonds have been produced on a commercial scale. these synthetic diamonds are commonly called "manmade" and/or "mm diamonds."
- Ore drill manufacturers association. see dcdma.
Diamond (impregnated) wire, английский
Diamond - shaped lattice, английский
Diamond ashlar, английский
A rectangular building stone having a face that is pyramidal rather than flat.
Diamond ballas, английский
Diamond bit, английский
- Any bit having diamonds inset in its crown, which serve as the cutting points or media. commonly also called boart bit, boart-set bit, bort bit, bort-set bit, bortz bit, bortz-set bit.
- A drill bit that has small industrial diamonds embedded in its cutting surface. cutting is performed by the rotation of the very hard diamonds over the rock surface.
Diamond bit core head, английский
Алмазная головка колонкового снаряда набора со съемным керноприемником
Diamond boring, английский
Diamond broker, английский
A person who buys packets of diamonds from the marketing agency of the diamond syndicate or other source, re-sorts the diamonds, and acts as a retail agent selling directly to consumers. compare diamond buyer, diamond dealer. 32 a glossary of the diamond-drilling industry
Diamond buyer, английский
A person who buys diamonds directly from the producer at or near the site where the diamonds are found or mined. not to be confused with diamond broker who is sometimes miscalled a diamond buyer. diamond chip. a fragment of a diamond crystal. also called chip, chip diamond.
Diamond chip, английский
Diamond chisel, английский
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Coring equipment, английский
Core equipment
Conductor string, английский
Conductor 2
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