- Sep 3, 2000
You often see the girdle thickness of a diamond as a single word description such as “medium” or “thin”. Many diamonds do have reasonably consistent girdle thicknesses, but when they don’t using a one word description can be misleading to truly dangerous for the consumer. Below is a list of all the possible combinations of words to describe girdle thicknesses. There are 45 potential combinations.
Another issue is the use of the word “Average” when it comes to the girdle thickness of a diamond. If you have a diamond with Xthn to Xthk ranges, the “average” the industry often then uses is “Medium” to describe the girdle in a single word. Who benefits from this is pretty obvious. In fact, the diamond may have mostly Xthn or Vthn girdle with only a tiny spot of the opposite thickness. Then it isn’t even a matter of a medium thickness girdle being found anywhere on the stone.
When an “average” is taken from measuring 8 or 16 places on the diamond it all makes more sense, but using the mid-range between two extremes can be dead wrong. Really, the right terminology should be “Mode” for the one word used when 8 or 16 measures are taken. The most common measure is probably a better indicator than the potentially non-existent range implied by using “Average”. At least a “Mode” terminology would be some proper indicator of the overall cut of the diamond and a proper use of the words themselves.
Food for thought late on Friday before a long weekend.......