The Four C’s
Acquiring knowledge of the four C’s is crucial before purchasing any diamond:
Carat weight, diamond Clarity, diamond Color and diamond Cut (not shape).
Other advanced characteristics of diamonds include diamond fluorescence and diamondenhancements. By understanding each diamond characteristic and knowing which questions to ask when purchasing a diamond, you are much more empowered when it comes time to make your diamond purchase
The weight of a diamond is expressed in carats. One carat – 0,2 gram equals 100 points
All diamonds have traces of their growth history. In gem-quality diamonds, this concerns minule internal and external characteristics, grades under clarity. The very best – and rarest – clarity is loup clean [LC]. Diamonds that have no inclusions visible to the unaided eye are also of excellent value
Most diamonds are colourless to slightly yellowish. The colourgrade is determinded by comparison with a series of masterstones, the best grade being colourless [D + excellent white]. Diamonds can also occur in all sorts of colours, ranging from brownish to striking yellows, pink to purple, red and blue. These are called-fancy colours
4. Cut & Shape
The proportions are determinative for the brilliancy and the fire of the diamond
The symmetry describes the variations of the different parameters which define the proportions. The polish describes the finish of the facets
Shape-Diamonds can be cut in different shapes (e.g. square, pear or heart).
The round brilliant is probably the best known shape