Colour refers to the amount of body color in a diamond. White diamonds or truly colourless diamonds have almost no
colours. This makes it very rare and valuable. Colour refers to the presence or absence of a yellow or brown tint in white diamonds. Diamonds that range f rom colorless to light yellow and brown fall within the normal color range. Although
most of the diamonds will appear colourless to an untrained eye, yet many of these diamonds will have slight tones of yellow or brown which affect its value and lower its price. (The exception to this is fancy-coloured diamonds, such as deep yellows, pinks and blues). Most of the diamonds used in the jewelry industry are near-colourless, with slight traces of yellow or brown. Diamonds may also come in deeper shades of yellow and brown along with a range of other colors. These are included in fancy-coloured diamonds. With near-colourless diamonds, less colour usually is for a higher value. With
fancy-coloured diamonds, the more intense the colour, the more value it will have.
COLOR GRADING FOR YADAV DIAMONDS
The colour of a diamond is measured on an alphabetical scale starting f rom D (colourless). Each Diamond at Yadav
Diamonds is GIA certified and follows the GIA’s colour-grading scale for diamonds.
The GIA grades diamonds on a scale of D (colourless) through Z (light colour). All D-Z diamonds are considered white, even
though they contain varying degrees of colour. True fancy coloured diamonds (such as yellows, pinks, and blues) are
graded on a separate colour scale. Each letter grade has a clearly defined range of colour appearance, that determines its
value, and as you move down the scale, the colour tint in the diamond increases. The diamond industry has adopted the
GIA diamond colour scale and rates the diamond based on this scale, even if they do not have it certified by GIA but other
institutions like IGI. etc.
A diamond’s color grade is based on how noticeable the color is, also known as depth of color.
Two diamonds with the same color grade can differ slightly in their depth of color, because each letter in the D-to-Z scale
represents a narrow color range and not a specific point.
Colorless. Slight color, which can only be detected by an expert gemologist, but still considered a "colorless" grade.
Another Yadav recommendation.
D-E-F COLOUR DIAMONDS:
These diamonds are extremely rare and valuable. They are considered colourless. D and E coloured diamonds have virtually no colour, and an F coloured diamond has a nearly undetectable amount of color that shows only in the face-down position. There is a very slight difference between D-E-F. In fact, they are almost indistinguishable in diamonds
smaller than 0.25 ct.
These diamonds are near-colourless. Diamonds with these grades look colorless face-up and nearly colorless face-down. They have slight traces of color that are not noticeable to untrained eyes when the stones are mounted. This range of diamonds are very popularly bought because they combine fairly high color with somewhat lower prices.
These diamonds are faint yellow. Diamonds in this range show very faint yellow color face-up and face-down. When they are mounted, small stones look colorless, but large ones show yellow tint.
HOW DOES ‘DIAMOND COLOUR’ AFFECT THE PRICE OF A DIAMOND?
The difference between two color grades of diamonds on the GIA D-to-Z scale can have a big impact on price. D and E
grade diamonds will have the biggest jump in prices. For example: A 1.00-ct. D-Flawless diamond can cost a lot more than an E-color diamond of the same size and clarity. In addition to their rarity, diamonds with less body color will reflect more true color, increasing the appearance of shine and brilliance.
Top gemological laboratories can distinguish diamonds on the basis of their diamond type, which is an important step in
separating natural vs synthetic diamonds. Most mined diamonds are type Ia, which contain some nitrogen impurities. These impurities absorb certain wavelengths of light resulting in varying shades of yellow body color. They are also involved in causing blue fluorescence in diamonds. Type IIa diamonds are almost devoid of nitrogen and tend to be colorless and non-fluorescent.
While only about 1% of natural diamonds are type II, most CVD synthetic diamonds are type II. At the lab any type II
diamond is referred for advanced testing to determine whether it is a natural mined diamond or a synthetic man made diamond. A natural mined D IF diamond that is type IIa is the rarest of all.