Precious stone

RCT are designed to successfully solve a whole number of tasks in nuclear power when testing fuel elements, in aviation and space industry when testing construction materials, nozzles and engine units, turbine blades and parts, in electromechanical industry-cables switching elements, electric motors in defense sphere- charges, equipment in prospecting for research of rock distribution and detection of precious stones in samples. 

In Ancient Rome, Pliny the Elder (c. a.d. 23-79) dedicated 37 volumes of Natural History to the emperor Titus. In the last of these books, dealing with gems and precious stones, he describes the properties of the fossil resin, amber. The ability of amber to attract dust was recognised and in fact the word electricity is derived from elektron, the Greek for amber. 

Foreign, unwanted insoluble contaminants in a metal (or precious stones). Usually oxides, silicates, or sulfides. 

In contrast to SCCO2, the conditions required to obtain SCH2O are harsh. In particular the temperature requirement of 374 °C precludes its synthetic utility for most organic compounds. That said, syntheses in sub-critical but high-temperature water are well studied and will be covered in the next section. Since many natural minerals and precious stones were formed in water at high temperature and pressure in the Earth s crust, the synthesis... 

A number of nonmetallic mineral deposits are formed during metamorphism as a result of recrystallisation. Important among these are graphite, asbestos, talc, soapstone and pyrophyllite, kyanite, sillimanite, and semi precious stones like garnet and emery. 

Lacinio, Giano. The new pearl of great price a treatise concerning the treasure and most precious stone of the philosophers Or the method and procedure of this divine art with observations drawn from the works of Arnoldus, Raymondus, Rhasis, Albertus, and Michael Scotus, first published by Janus Lacinius, the Calabrian, with a copious index. rhttp //www.ebrary.com1. 

Original T.P. Reads The New Pearl of Great Price. A Treatise Concerning the Treasure and Most Precious Stone of the Philosophers. Or the Method and Procedure of This... 

A Hermetic treatise [on the counterfeiting of precious metals and of the counterfeiting of precious stones] edited by Jon Symon. Hamilton (ON) Acorn, 1979. 

Crow, William Bernard. Precious stones their occult power and hidden significance. London Aquarian P, 1968. 64p. ISBN 0850300037... 

Minerals are the most abundant type of solid matter on the crust of the earth they are homogeneous materials that have a definite composition and an orderly internal structure. Minerals make up most of the bulk of rocks, the comminuted particles of sediments, and the greater part of most soils. Over 3000 minerals have been identified, and new ones are discovered each year. Only a few hundred, however, are common most of the others, such as, for example, the precious stones, are difficult to find (Ernst 1969). Table 3 lists common minerals and mineraloids. Many schemes have been devised for classifying the minerals. In the scheme presented in Table 4, minerals are arranged in classes according to their increasing compositional chemical complexity. 

A colorless mineral known as corundum (composed of aluminum oxide) is colorless. A red variety of corundum known as ruby, a precious stone, owes its color to impurities of chromium within the crystal structure of corundum. Blue and violet varieties of corundum are classified as sapphires, the blue being the result of iron and titanium impurities, and the violet of vanadium impurities within the corundum crystal structure. Another colorless mineral is beryl (composed of beryllium aluminum silicate) but blue aquamarine, green emerald, and pink morganite, are precious varieties of beryl including different impurities aquamarine includes iron, emerald chromium and vanadium, and morganite manganese. 

Diamond Precious-stone grinding and polishing Pure carbon High refractive index hardest material on earth... 

Gems and Precious Stones. The University of Wisconsin Geology and Geophysics Department, Professor Jill Banfield, http //www.geology.wisc.edu/ jill/306.html... 

Jewellery, coinage and investment. In jewellery most of the Pt-alloys employed contain 95% platinum the mechanically more stable alloys are Pt95-Cu5, Pt96-Pd4 and Pt90-Irl0 used for mounting precious stones. 

Beryllium oxide is a component of precious stones, emerald, aquamarine and topaz. Beryllium is utilized in nuclear reactors to moderate the velocity of slow neutrons. It is hot-pressed to appropriate shapes and sizes that yield high strength and ductility for its applications. 

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