Date: 4/12/2010 1:18:35 PM
Author: oldminer
A Rectangular stone which measures 1:1.15 l/w has 15% more spread than an identical weight, and identical width SQUARE diamond which measures only 1:1 l/w. It would a matter of bulge, depth or both combined.
The same would not be true for pear, marq, oval, but only for rectangular shaped diamonds. These rounded configurations have variable outline curves and do not have spread based simply on length and width measures. It will have to be pixel counts of the girdle plane area or some other strategy to measure this area.
Dave,
Yes , you can say what if two diamonds with difference in L/W 15% have same weight then spreads have difference in 15%,
But in such case you need significantly change angles after you changed L/W to receive same weight . did you try do it without changing Depth?
it is not easy to receive same weight, same depth and difference in L/W in 15%. Could you give any real example? I did not check Emerald( to much combinations) , but I sure what it is not possible for classical Pear, Oval, Marquise,..
Lets discuss about real examples( with real girdle thickness) what consumer can find on market