As a general rule you the best cut ones have tables in the 50 - 59 % range. Depths in the 64 - 70%(ideally 65 - 69) range. But the numbers matter much less than what it looks like as whole as there are a lot of numbers not available on the certificate. But when you buy a true antique OMC each one is treated as unique so you should take a look at many of them and decide if you like this particular one best. You could get an ASET image http://www.americangemsociety.org/newhandheldaset.htm and post it and we can tell you more, but most people shopping for a true OMC are not looking for an optimal light performance just a stone that speaks to them.Date: 1/23/2010 10:51:46 PM
Author: hashoresh
The one I am looking at has an extremely small culet, which is important to me.
What table and depth percentage should I be looking at to determine how well the stone compares to other very well cut stones?
He would have to measure it after taking it out for me to view.
It really depends as these stones are evaluated differently to modern rounds and are valued for their rarity and uniqueness, look at the stone as a whole to judge its beauty and optics, if you are buying online then images such as ASET are essential to help you choose.Date: 1/23/2010 10:51:46 PM
Author: hashoresh
The one I am looking at has an extremely small culet, which is important to me.
What table and depth percentage should I be looking at to determine how well the stone compares to other very well cut stones?
He would have to measure it after taking it out for me to view.
I totally understand that. My last purchase was a transition cut diamond. I have another cut in the early 20s that is fabulous as well. Do you want the more cushion-y look of the OMC or would you be willing to look at round OECs and transition cuts? Both of those are much easier to find with small to v. small culets. I personally love ones with considerable color myself. Though both of my older stones are fairly colorless (about a G and about an I) which is odd since I am drawn to color.Date: 1/24/2010 7:25:34 PM
Author: hashoresh
I thought I might be able to buy more diamond for less money if I went with an older cut stone with considerable color. I do love the look of the old cut stones...and I like the idea of it being an heirloom stone, even if I didn''t inherit it from anyone in my family.
Ditto. OECs and then transitions are newer and much more likely to have small culets. I do love the history of an antique diamond, so I also understand that appeal, but a vintage stone will have a nice bit of history as well as more of the look you prefer.Date: 1/24/2010 8:45:57 PM
Author: clgwli
Do you want the more cushion-y look of the OMC or would you be willing to look at round OECs and transition cuts? Both of those are much easier to find with small to v. small culets.