The 4 C's
Cut is a feature that reflects the beauty and brilliance of the diamond, and usually determines both the value and price. A key factor when making a diamond purchase is cut, as one may decide to compromise on clarity, size or color, but never on the cut. You must always ensure that you have the most ideal cut diamond. In 1919, a Belgian Mathematician, Marcel Tolkowsky, formulated the exact proportions of how a round diamond should be cut, in order to maximize the light reflections of the diamond. Over the years, with advances in modern technology, based upon Tolkowsky's formula, the ideal range was developed.
Clarity refers to the extent of birthmarks or "inclusions" in the diamond. Most inclusions are not visible to the naked eye and can be viewed through a 10X magnification device.Inclusions interfere with the dispersion of light and affect a diamond's brilliance. With fewer and slighter inclusions, the stone is both rarer and more valuable.
Clarity is graded on a scale that ranges from internally flawless (IF), very very small inclusions (VVS1-VVS2), very small inclusions (VS1-VS2), small inclusions (SI1-SI2) to imperfect (I1-I2-I3) with obvious visible.
The Color of the diamond could range from colorless to yellow:
To the untrained eye a diamond, which at first may apPear colorless, can in fact have traces of yellow and brown colors in it. Colors, range from "D" grading (as the most colorless) to "Z" grade (as the closest to fancy yellow). The closest to colorless a stone is, the more valuable the diamond is.
Out of the 5 C's Carat is the easiest to determine. Carat is actually a measurement of weight rather than size. However it should be relative to size as well. One carat is equal to 0.20 grams (weight). In the diamond industry "1.00 carat" is divided into 100 "points", so for example a 70 "points" diamond weighs 0.70 carats.