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On 6/6/2003 12:42:16 AM abilu wrote:
GIA doesn't give the crown and pavilion angles. Can I calculate these angles or percentages using the l x w x d and depth / table? I tried some trig. but it gave me funny results.
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On 6/6/2003 1:27:57 PM pqcollectibles wrote:
Unfortunately, no, you cannot calculate the angles. Someone posted formulas to try that, but they didn't work. You get much the same result as if you just use Crown and Pavillion %'s. This may be a function of the girdle thickness???I really dunno for sure.![]()
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On 6/6/2003 4:29:30 PM pqcollectibles wrote:
Would be wonderful if someone could come up with formulas! I feel confident that the girdle thickness must be a part of the error. One of the vendor's websites shows a method to approximate the angles, but you have to physically have the diamond in hand to do it.![]()
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On 6/7/2003 2:12:38 AM Mara wrote:
I think in the past Leonid has posted calcs that will help you somewhat accurately convert %'s from something like an EGL cert to angles for the HCA. But to have nothing and find out the angles? Not gonna happen!![]()
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