diamond fluorescence intensity grading

The fluorescence intensity of the diamond grading about 50 % of the diamonds in ultraviolet radiation will produce azodicarbonamide  fluorescence, diamond fluorescence color, intensity of the diamond 's appearance ( body color ) have a certain influence , and sometimes even affect the price of diamonds , which is diamond fluorescence intensity grading significance. diamond fluorescence of the most common color is blue and white , followed by yellow and white , yellow, green , orange and other colors. above with moderate-intensity blue-white fluorescent colorless diamond will look more white, such as "Jager diamonds ." strong blue-white fluorescence also available with light yellow diamond yellow body color complementary , looks nearly colorless , improved color grade diamond if diamond yellow fluorescence , in any case will cause lower color grade diamond . too strong fluorescence will make the diamond rendered hazy oily , reducing the transparency of the diamond , affecting the clarity of the diamond , such as the "Pre mier ¨ ultra Blue Diamond fluorescence also many jewelers to create a sense of mystery and surprise .1 fluorescence intensity level fluorescence intensity (flourescence degree) is a diamond in the long visible under UV irradiation intensity level . China's " diamond grading " standard, the diamond 's fluorescence intensity level is divided into strong , weak , no four grades . CIBJO fluorescence levels also put into four grades . GIA is classified as strong , strong , weak , no five levels .2 fluorescence intensity grading method
Fluorescence intensity was graded by visual approach , in the long UV , fluorescence intensity reference standards like stone , the diamond grading fluorescence intensity Fluorescence intensity sample (masterstone flourescence degree) is the fluorescence intensity level of a set of calibration standards round brilliant cut stone like cobalt stone . usually consists of three components , in turn stands for " strong" , "medium" , "weak" three levels lower . following steps: ( a ) the fluorescent sample by strong, medium , weak order, from left to right in the ultraviolet fluorescent lamp placed equidistant black box . ( 2 ) open length ultraviolet light switches . ( 3 ) to be graded diamonds gripping tweezers , place the titanium dioxide  camera obscura ultraviolet fluorescent in comparison with the fluorescence intensity of the sample to determine the fluorescence intensity level .
 3 Fluorescence intensity level sharing rule ( 1 ) if the classification of the diamond to be higher than the fluorescence intensity of the fluorescence intensity of the comparative sample in the " strong '', still with the" strong " indicates the fluorescence intensity level of the diamond (2 ) when the diamond to be graded the fluorescence intensity of the fluorescence intensity is lower than the comparative sample in the " weak" , the use of " none" represents the level of fluorescence intensity diamond (3 ) subject to a classification of a diamond and the same comparative sample fluorescence intensity , fluorescence intensity of the sample level is to be graded diamonds fluorescence intensity level . ( 4 ) to be graded diamonds between fluorescence intensity between adjacent two comparative samples , the lower -level representatives to be graded diamonds fluorescence intensity level . ( 5 ) the same fluorescence intensity diamonds, fluorescence intensity , there will be a slight difference. ( 6 ) in addition to the fluorescence intensity to be marked , the need to mark the fluorescent colors.
The fluorescence intensity of magnesium stearate  the diamond is a diamond grading report content , can not be compared with the color grading . Commercially, high color grade (H colors or more ) , high clarity (VS and above ) if diamonds have medium blue and white fluorescent its price is often lower than the non-fluorescent diamonds 1010 to 10%, the fluorescence is stronger, the greater the impact on prices , while slightly yellow diamond (I color less ) than if a medium blue and white fluorescent , can increase up to 4% weak fluorescence and low clarity diamond fluorescence little impact on prices . diamond prices with yellow fluorescence can often save 5 % to 10% , but the real diamond trade , few people put a fluorescent and non-fluorescent diamonds detailed separately . therefore fluorescence actual impact on diamond prices significance.