Diamond Color and Grade Buying Guide
Gem Body Color.
Color is one of the most important factors to consider when selecting a diamond because one of the first things most people notice is whether or not the diamond is white, or, more accurately, colorless. 鑽石手鏈 It is also one of the most significant factors affecting value.
Color refer to the natural body color of a diamond. The finest and most expensive, “white” diamonds are absolutely colorless. Most diamonds show some trace of yellowish or brownish tint, but diamonds also occur in every color of rainbow. Natural colored diamonds are called “fancy” diamonds.
How to look at a diamond to evaluate color?
In white diamonds, color differences from one grade to the next can be very subtle, and a difference of several grades is difficult to see when a diamond is mounted. Keep in mind that it is impossible to accurately grade color in a mounted diamond. When looking at an un-mounted stone, however, even an amateur can learn to see color differences if the stone is viewed properly.
Because of diamond’s high brilliance and dispersion, the color grade can not be accurately determined by looking at the stone from the top, or face-up, position. It is best to observe color by examining the stone through the pavilion with the table down. Use a flat white surface such as a white business card, or a grading trough, which can be be purchased from a jewelry supplier or the Gemological Institute of America, GIA. Next, view the stone with the pavilion side down and the culet pointing toward you.
What is diamond body color?
When we discuss diamond body color we are referring too much yellow or brown tint can be seen in a white (colorless) diamond. We are not referring to rare natural colored diamonds, which are called “fancy” or “master Fancy” in the trade.
Today, most colorless diamonds in the united states and in an increasing number of other countries are graded in alphabetical scale beginning with the letter D, which designates the finest, rarest, most absolutely colorless diamond, and continuing down through the entire alphabet to the letter Z. Each letter after D indicates increasing amounts of yellowish (or brownish) tint to the body color. It’s easy to understand the color grade, if you just remember: the closer the letter is to D the Whiter the diamond; the closer the letter to is to Z, the more yellow (or more brown) the diamond.
This grading system, with its letter designations, is part of a diamond grading system introduced by the Gemological Institute of America, often referred to as GIA, and is used extensively in the diamond trade around the world. Grades E – F are exceptionally fine and diamonds in this range can be referred to as “colorless, ” although technically, E and F are not colorless since they possess a very slight trace of yellow; the tint is so slight, however, that the trade agrees they may be referred to as colorless.
What color grade is most desirable?
The diamonds colors, D, E, and F can all be grouped as exceptionally fine and may be referred to as “colorless, ” “exceptional white. ” or “rare white” as they are often described by diamond dealers. G and H may be referred to as “fine white” or “rare white. ” These grades are all considered very good. I and J colors are slightly tinted white. K and L show a tint of yellow or brown, but settings can often mask the slight tint. Grades M – Z will show progressively more and more tint of color, and will have a definite yellowish or brownish cast; diamonds with a strong yellowish tint are often referred to as cape stones in trade.
Diamond grades D – J seem to have better resale potential than grades K – Z. This does not mean that diamonds having a more tinted color (grades below J) are not beautiful or desirable. They can make lovely jewelry and, depending upon other quality factors and “overall personality, ” color. Remember: color is important, but it’s only one of four factors you must learn to weigh as you judge the whole stone.