The colour is a key element in the evaluation of a diamond, the higher the intensity of white, the greater the value of the diamond. Thanks to analysis performed by its staff, Nardelli assures the gradation of colour, which is specified on the validation coupon of this guarantee.
Diamonds are classified on a scale called "master stones", established by the Gemological Institute of America ( GIA ), which goes from tone colorless tone of shades (D), to tones with yellow undertones increasingly accentuated (Z).
The carat is the unit of measurement of the diamond. The value and rarity of a diamond increase on the basis of its size but also include a high quality relationship between the degree of colour and the clarity and the precision of the cut. Nardelli diamonds, considering all these features, are among the best currently available on the market.
Dimensions contribute significantly to increase the value of a diamond, because large stones are rarer than small. A 5 - carat stone is valutated more than five stones of one carat of equal quality. Nardelli diamonds, bearing in mind all of these standard, are among the best available today.