The four C's;
Diamonds are a confusing and risky business. Fortunately there is a practical process almost a scientific means for valuing diamonds and then establishing prices. Diamond dealers and their buyers use a standard vocabulary or jargon in their gemstone world. This revolves around measuring the weight and quality of a gemstone. The determining factors of gemology are called
the four C's; carat, color, clarity and cut. These are the four basic dimensions of gem-talk.
The term CARAT, for a standard weight was originally derived from the word carob, a small oriental bean which ancient lapidaries balanced upon their fine measuring scales. The carat today is the gemmologist's unit of measure equivalent to 200 milligrams or one fifth gram. A point is a one-percent fraction of a carat, so there are 100 points in a carat. A gemstone is thus generally priced on a per carat basis and the larger a whole stone is the more costly it is value.
The quality of a gemstone diamond or otherwise is determined but
its COLOR. The shade, intensity and hue of a stone may indicate rarity, which affects both price and perceived beauty. The whiter a diamond, the deeper the green of an emerald, the more rare, the more precious, the more expensive. To many diamond lovers, the stone's color is of prime importance.
Diamonds are found in different colors, even in finely varying degrees of white from exceptionally white-plus to tinted white. International diamond dealer color-grade stones by a standard alphabetical system of twelve major classes. Most stones contain traces of color, even the slightest tinge that only an expert eye can detect. The most common colors among diamonds are yellow and brown. Sometimes reputable jewellers label, their diamond colors by particular trade terms, crystal, white, silver cape, etc; terms calculated to evoke a customer's interest. many experts recommend that given a choice, one would buy the whitest possible diamond and sacrifice the next factor, clarity.