The standard that measures diamond quality mainly has four dimensions, namely weight(CARAT), clean degree(CLARITY), cheap wedding dressescolor and luster(COLOUR) and slice work(CUT), is also "4 C standard" said usually.This standard from GIA(American college of precious stone) the foundation is including the most essential diamond in China evaluation in the world currently standard.The diamond is learned a house by the precious stone of international approbation to carry on authenticating and countersign a third square independent opinion book, according to 4 C standard, subsequently decide diamond price.jewelry factoryCurrently nations most the precious stone of authority authenticate consultation laboratory for IGI, GIA diamond of simple discriminate a method:Need the aid of a 10-2000% magnifiers to lend support to and make several in brief prognosticate.Method a:Observe the loins of diamond, if whet the sand-like in shape waistline most suitable suitable for use this method, diamond because compare any emit to imitate an article strong and tough, south sea pearltherefore can't be like to emit to imitate an article sort to appear a thin-like in shape veins, the waistline of diamond is presenting grain-like in shape external appearance.Method two:the diamond ratio emit to imitate an article strong and tough, emit to imitate the engraving of article noodles 稜 line to usually compare the felling circle of diamond bluntness, but the engraving of diamond noodles 稜 the line is necessarily sharp-edged.Method three:Emitting to imitate an article according to the diamond ratio is strong and tough and emit to imitate the engraving of article noodles 稜 line to usually appear a worn circumstance.Method four:If the diamond stays natural side and there is opportunity on the natural side discovering "triangle growth line" that the diamond possesses singly.Method five:If the diamond appears to collapse to break, the external appearance usually all is stairs-like in shape, but emits to imitate an article then will as different as chalk and cheesely present curved Hu or shell-like in shape.cheap women shoes
The degree of hardness examines
The diamond has already known the hardest natural born material, having no what things can draw trace on the diamond, if can draw trace of then far from diamond.
Transmit heat sex to experiment
Shout an one breath in the meantime in treating and arguing diamond and other alike products, if diamond its surface then coagulates of water fog should compare water fog on other products evaporates quickly, this because the diamond has Gao to transmit heat sexual reason.
Observe anti- cast light
The waistline that using the magnifier can observe diamond presents 1 kind to whet very thinly sand-like in shape also sparkling glint light.The characteristic of diamond is the one and only.
See a growth point
Observe under the magnifier, true article diamond of there is often ditch line on the crystal noodles grow with the triangle a point, but the imitation article has 3 types:①Added to oxidize the common glass of aluminum, because refractive index and color spread an exaltation,wholesale cheap fashion jewellery the easy mistake goes into, but the degree of hardness is low.②The blue precious stone synthesized with the chemistry and have no the color sharp crystal stone makes copy, the degree of hardness approaches, but the refractive index is low also the double refracts a phenomenon, under the magnifier it is thus clear that weigh a shadow.