A 'D' grade for a diamond refers to its colour. This grade is the highest jewelry grade of diamond, and it means that the stone lacks significant nitrogen, which gives a diamond a yellow colour.
If J is a description of the colour of a white diamond, that grade is given to the near colourless diamonds. You can learn more about this grade from the chart, below, which shows you the full colour range of 'colourless diamonds' from D to Z.
the letter grade for 61 is a D.
That is a D+
Yellow diamonds, also known as canary diamonds come in all shapes, sizes and colors with the intense yellow and vivid yellow being the most expensive colors. They are quite rare and just as expensive and usually have a very high grade issued by GIA. Black diamonds that are available in the market are usually low grade white diamonds that have been colored black, however, natural black diamonds can be expensive depending on the quality.
D
For a 'colourless' or 'white' diamonds, the highest colour grade is D; for coloured diamonds, the highest colour grade is Fancy Vivid.
The notation AA is not commonly in use when grading colourless diamonds: the highest grade is D. The notation AA can be used to grade black diamonds as it falls into this range: AAA, AA+, AA, A, and I1 with AAA being the best. Note GIA does not grade black diamonds.
The Gemological Institute of America (G.I.A.) grades color alphabetically from D (totally colorless) to Z (yellow).For a diamond to be considered “colorless,†the G.I.A. requires that it be a D, E, or F. However, the D-Z scale is continuous, so the difference between an F and G is very small. The average color for engagement diamonds in the retails industry is G to H.
Not all diamonds are colorless. Diamonds can come in various colors such as yellow, brown, pink, blue, and black, among others. The most valuable and sought-after diamonds are those that are colorless or display a vivid and intense color.
If J is a description of the colour of a white diamond, that grade is given to the near colourless diamonds. You can learn more about this grade from the chart, below, which shows you the full colour range of 'colourless diamonds' from D to Z.
Five diamonds in an upside-down pattern U D= Diamonds *=Air D|D|D D|*|D *|*|*
The term "SI" indicates a clarity category, not a colour category. For clarity, "SI" indicates slightly included, and is usually followed by a number, 1, 2, or 3. In this scale, fewer is better.
On the colour grade for diamonds, H is commonly called 'near colourless'. (Colourless stones are graded D, E and F.)
'White' diamonds are graded in colour using letters of the alphabet, from D to Z, D being the highest grade. A number in a diamond's description can reference its weight in carats, or the number of visible flaws.
A B C after that grade D
Black diamonds that are available in the market are usually low grade white diamonds that have been colored black, however, natural black diamonds can be expensive depending on the quality.
No, the only failing grade is an F. D is just below average.