may belong more in the category of colored gemstones than in a diamong category. The primary reason is because the 4 - C's are no longer the holy grail.
Sure, one C stand for color, but the most important characteristics in judging colored diamonds may be:
- Hue - rather than color, since "color" is primarily
used in "color grading". Various natural hues are more rare, while other hues are more desirable. Hues range from red, blue, green, orange, purple, yellow, brown, black
- Saturation - may confound the diamond folks, but
colored gemstone lovers know that "saturation" refers to the amount of hue (or amount of coloration of the primary hue) in a gem. Satuaraion is normally stated in terms of weak, fair , medium, strong or vivid
- Tone - is the amount of undesireable (gray and brown) coloration present in the diamond. Tone is often represented as very light, light, medium, dark or very dark.
Note: Not all secondary hues are undesirable. Many undertones add a unique character to a gemstone.
Note 2: Since the diamond crystal is cubic and monochromatic (single refractive), a secondary hue will not appear quite the same as in a double refractive crystal such as corundum (ruby and sapphire)
Note 3: For a more detailed discussion of @ saturation and tone and @ here
Colored Diamond Hues
Colored Diamond Values
