All Colpo & Zilio diamonds are certified and guaranteed by the RJC (Responsible Jewellery Council), the only body in the world that certifies the entire extraction chain. The diamonds are also verified one by one and certified by Italian CISGEM laboratories. Only these certifications can give the absolute guarantee of exclusive extraction and natural origin and respect for all environmental regulations.
All diamonds have traces of their growth history. In gem-quality diamonds, this concerns minute internal and external characteristics, graded under Clarity. The clarity scale reflects the size, number, location and visibility of the characteristics when examined with a 10 X loupe. The very best – and rarest – clarity is loupe clean. Most inclusions, however, are not visible to the naked eye. Diamonds that have no inclusions visible to the unaided eye are also of excellent value.
Most diamonds are colourless to slightly yellowish. The colour grade is determined by comparison with a series of master stones, the best grade being colourless (D, exceptional white +). Diamonds can also be in all sorts of colours, ranging from brownish to bright yellows, from pink to purple, red and blue. These are called “fancy colours”. Certain diamonds can react to “black light” with grades varying from nil-slight-medium to strong. Besides colour, the fluorescence of the diamond is also graded.
We are available to fulfil each and every request and customize any diamond supply. We offer excellent discounts in relation to the reference price of the Rapaport Diamond Report, the global list of cut diamonds. Request a free quotation and take advantage of our offers.
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