CARAT-WEIGHT
As with all precious stones, the weight of a diamond is expressed in carats. The word 'carat' originates in a measurement of nature, in the seeds of the carob tree.
The weight of a diamond was traditionally determined by means of these seeds, later the weight system was standardised, and the new criteria for a diamond is; one carat is equivalent to 0.2 grams (one fifth of a gram). A carat is also divided in to 100 'points', and for this reason a diamond of 25 points is described as being a quarter of a carat or 0.25 carats. Here are some examples that show the approximate size of diamonds issued.
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CLARITY
Almost all diamonds contain tiny carbon noncrystallized vestiges or small crystals that are not diamonds. The majority is not perceivable at first and they are only observed if increase methods are used. These impurities denominate inclusions, they are the digital tracks of nature that make each diamond unique. Nevertheless, the minimum quantity of inclusiones present the more exceptional will be the stone.
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The purity is the used term to indicate to what extent the acquired stone is free of these natural phenomenas. 4 international systems of graduation exist to classify diamonds: GIA, CIBJO, IDC and Scan D.N., as well as one that next will standardize internationally called ISO. GIA considers that a stone is perfect when it does not present inclusions, niether inside or out. Other systems use the term " Loop Clean, " which indicates that it does not present inclusions internally. Below this maximum degree the systems are compatable. compatible.
COLOUR
Although most diamonds do not apparently have color, others can contain Slight yellow or brown dyes, they are the denominated diamonds forever. Diamonds of red, blue, pink or amber colour are known as diamonds Fantasy. These are exceptionally rare.
CUT
Of all 4c's, this is the one in which man exerts a direct influence. The other three are dictated by nature. The stature or diamond's form will influence a fundamental way its fire and brightness, it will be the ability of the cuter the one that releases its beauty.
AS A DIAMOND CATCHES THE LIGHT
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The cut of the diamond is that which allows the light to be reflected in an optimal way. 1, When a diamond is carved with the appropriate proportions, the light is reflected from one facet to another, later dispersing through the plateau or superior part of the stone. 2. If the cut is too deep, part of the light escapes through the opposite side of the pavilion or inferior part. 3. If the cut is too shallow, the light escapes through the pavilion or inferior part before being reflected.