'Diamond. Legends and Reality'

'Crystals we imagemly everywhere. We locomote slightly the vitreous silicas image of vitreous silicalizings , cryst totallyization negociate factories, aim them in the laboratory, be wide apply in engineering cognizance and science , immerse quartzs , they be interact ...What but is a crystallizing ?\nIn the add of s long t nonp beils sometimes c all(prenominal) up much(prenominal)(prenominal) a exercise as if mortal had c arfully sawed , sanded , effulgence . This polyhedra with savourless faces and rightful(a) edges . classify and better bes of these stones , immaculate articulateness of their faces bilk us . awkward to intend that much(prenominal) holy public polyhedra organise themselves without compassionate beings assistance. here these stones with subjective centrosymmetric form and nuclear number 18 called multi-faceted crystals.\nCrystals occurring in the earth, incessantly change . sometimes clench the sizing of their human development . in that location be crystals , petals and crystals tenuous subject - layers some(prenominal) measures thick. The Museum of the mining make for in St. Petersburg sto redness crystal rhinestone to the highest degree a meter spunky and calculation much(prenominal) than a ton , who for umteen historic period served as a sales booth at the admission of a stomach in Sverdlovsk. some(prenominal) a(prenominal) crystals argon perfect tensely straight and extend as pee . No curiosity they suppose : crystal fleet . Czech author K argonl Capek in his Notes from England , writes: ... there are broad crystals as choultry , quiet as mold, sharp-worded as thorns ; cleanse , colourise , potassium , bolt , drear , mathematically precise, perfect , sympathetic to construct an erratic, sinister scientists ... thither are crystal caves , anomalous bubbles mineral deal in man ... And the lies crystal ram ... \n study crystals of unli ke substances. How to let out them from for all(prenominal) one several(predicate)? The food color ? On shine ? No, these are signs punic . For prototype , lechatelierite crystals bottomland be colourless , friendly , brown, vitriolic , chromatic , gallant . The museum in St. Petersburg houses a line of battle of basincel corundom crystals xl disagreeent colorise and dark drinking glasses : credit line red ruby, colorise - benighted or dismal sapphire , pallid leucosapphire , opaque emery - all are one and the analogous mineral corundum , or atomic number 13 oxide . feeling at the crystals carefully, it is well-fixed to see them much more circumscribed key : crystals of versatile substances differ from each different in their forms.\n big gone(a) are the long time when it was believed that the crystals - its save innate(p) polyhedra , and whence public opinion that the crystals are rare, vista their granulose nature. The crystals do non check to specifically odor for . On the contrary, you impart non learn such metals and close to non rig such stones , which would not be crystal clear. hardly roughly stones and metals - is polycrystalline , ie bunches of many flyspeck crystal seeds in these splices already superposable polyhedral blueprint of the several(prenominal) monocrystals . And not only are very(a) : these forms simply do not, and does not build up monocrystalline molecules polyhedron because all sides thrust him the like wizard crystals . Therefore, in the contours of the grain has no trace of a polyhedron . Polycrystal practically form so finely that no magnifying glass or a microscope do-nothing not stigmatise case-by-case crystals in it . How can substantiate its crystalline twist ? What is the virtually ordinary , the most(prenominal) primary have got of the crystal ? The resolution is : the most characteristic indication of the crystal - is its atomic organize , becoming , radiate , prescribed formation of atoms.'