Giangi
Ideal_Rock
- Joined
- Jan 23, 2003
- Messages
- 2,530
Hi folks!
So.... A while ago I got an estate diamond. It was quite big, 2.87ct, faint yellow (right between L-M color) and I1 clarity. Due to the large facets the grade-setter feather was eye-visible.
Here's a breakdown of the specs:
2.87 L-M color I1 clarity
cushion-profiled old european cut
mm. 8.38-8.67 h.5.62mm
depth: 67.1 %
table: 50.5 %
crown: 18.5 %
pavilion: 45 %
girdle: thin to thick; bruted
culet: large, faceted
four naturals (one per side) with trigons
The stone was very nice and quite lively...but old. You could tell how old it was by the amount of small abrasions, indentations, chips and nicks that you can also make out in the attached picture.
To make a long story short, I decided it was a good idea to look for a cutter and ask for an opinion. There aren't really that many over here, but I was recommended one name and there I went. He first eyeballed it and said it had a good potential; then, we started doing all the recut-related math to find out the loss weight of a recut to a round brilliant. The idea, in this kind of stones, is to keep the smallest existing diameter as the largest one and to "file down" to the desired dimensions the other measurements in order to get a round stone. In this case, some naturals and external characteristics had to be "trimmed" and polished away.
He gave me a final weight figure, saying that he likes to err on the conservative side not to create any illusionment or hope lol. I said it was ok and I would have gone back there in a week to pick it up.
Sooooo....when I went, I got the great news...I was first quoted a possible weight of 1.90-2.00cts depending on the thickness of the girdle and other factors. (We both agreed it was convenient to recut the stone to a good-very good make compromising proportions and size, since I really didn't want to go below the 2cts mark) The final weight was actually 2.38ct!! The color went up from a low L to a good K because of the girdle, which is not porous now, and because of the not-so-chunky pavilion. Clarity also went up from I1 to a VERY good SI2 - completely eyeclean from the top- because a good part of the feathers were cut away.

Here are the specs on the new beauty:

2.38 ct K color SI2 clarity
round brilliant cut
depth: 63 %
table: 54.5%
crown: 15.5% or 33.5°
pavilion: 44%
girdle: thin to slightly thick, bruted
culet: pointed
polish: very good
symmetry: good
fluorescence: very slight
Depth is a little higher than what we like to see most of the times, but weight-retention was to be considered in this case (as we really wanted it to be 2 cts or more) and the fact it used to be square didn't allow the cutter to "play" too much with the measurements.
Needless to say I am literally in awe with the final results as it started as a pretty stone (according to the cutter it dated back to 1700-1750!!

Just wanted to share this interesting topic with you. Hi guys!

