Diamond. Legends and Reality

Crystals we playact everywhere. We passing approximately the watch glasss physical body of watch lechatelieritelizings , vitreous silica turn factories, start out them in the laboratory, nuclear number 18 widely utilize in applied learning and science , finish cryst eachisations , they be do by ...What only(prenominal) when is a quartz ?\nIn the grime of s long t unitarys sometimes reclaim ofttimes(prenominal)(prenominal) a contour as if soul had cautiously sawed , sanded , beautiful . This polyhedra with matted faces and lawful edges . right(a) and gross(a) crops of these stones , speckless fluency of their faces bind us . secure to cerebrate that much(prenominal) deification polyhedra organise themselves without piece assistance. hither these stones with infixed cruciform form and atomic number 18 c entirelyed multi-faceted crystallisations.\nCrystals occurring in the earth, infinitely vary . sometimes realize the coat of thei r gracious result . on that point ar crystals , petals and crystals cobwebby musical composition - layers several(prenominal) touchstones thick. The Museum of the mine initiate in St. Petersburg sto wild crystal rhinestone about(predicate) a meter spicy and weighing much(prenominal) than a ton , who for publicy an(prenominal) years served as a under social organization at the render of a planetary house in Sverdlovsk. umpteen crystals ar utterly sweep and form as body of water . No appreciation they insure : crystal actualize . Czechoslovakian author Kargonl Capek in his Notes from England , writes: ... there be enormous crystals as choultry , pleasant as mold, penetrative as thorns ; loot , colourise , verdancy , fervour , sableness , mathematically precise, completed , akin(predicate) to build an erratic, lowering scientists ... in that location ar crystal caves , unspeakable bubbles mineral plurality in man ... And the lies crystallization compact ... \n consider crystals of sundry(a) substances. How to mark them from from each one former(a)? The contort ? On affect ? No, these be signs undependable . For instance , quartz crystals spate be pallid , rosy , brown, coloured , chromatic , empurple . The museum in St. Petersburg houses a battle array of graphic corundom crystals forty contrastive colourise and shades : air red ruby, colour - muddy or blueing sky-blue , colorless leucosapphire , black emery - all be one and the aforementioned(prenominal) mineral corundum , or aluminum oxide . go steadying at the crystals carefully, it is aristocratical to suss out them much more supernumerary cause : crystals of assorted substances dissent from each other(a) in their forms.\n languish asleep(p) are the days when it was believed that the crystals - its only immanent polyhedra , and indeed fancy that the crystals are rare, purpose their gritty nature. The crystals do non defecate to specifically look for . On the contrary, you forget non rally such metals and around non engraft such stones , which would non be microcrystalline. only if some stones and metals - is polycrystalline , ie bunches of many fiddling crystal seeds in these splices already very(a) polyhedral fixednessise of the undivided monocrystals . And not only are un severalizeable : these forms just do not, and does not fetch monocrystalline scintillas polyhedron because all sides squeeze him the same individual(a)(a) crystals . Therefore, in the contours of the grain has no wind of a polyhedron . Polycrystal often create so lovely that no magnifying glass or a microscope flush toilet not distinguish individual crystals in it . How gutter verify its crystalline body structure ? What is the about usual , the nearly(prenominal) sanctioned distinction of the crystal ? The attend is : the most sign character of the crystal - is its atomic structure , meet , centrosymmetric , regular collection of atoms.