why not cut a modern rb old European style ?

[Dancing Fire]

 

[strmrdr]

if there was a market someone would.

Why the change in style?
one word... lighting.
3 words: changes in lighting.
many words: The change from candles, lamps and torches to electric lights.

 

[strmrdr]

whats interesting is that for a 53% table and 60 lgf% there is a very narrow range that would be acceptabe.
Each image represents 25 combos.

 

[strmrdr]

53 table 65% lgf you get a few more acceptable combos.

 

[Garry H (Cut Nut)]

We have just cut some for the Master Stone Study.
I have not seen them yet - should have them here in a few weeks.

We expect to see more fire and less brightness. but as we know - the best and only way to confirm these things is to suck it and see.

http://www.octonus.ru/oct/mss/index.phtml is what we have to hand - the short lower girdle fire stones are not listed here yet.

I am working now on a light box prototype that will hopefully allow people to make accurate judgements as to different diamond cut qualities for brightness, fire and scintillation and dark zones. Like GIA did, but with less money and thanks to Sergey, smarter.

 

[strmrdr]

80% lgf% 53% table, as you can see the more modern cut is much more suited to a wide range of rough by giving the cutter more options.
That said it likely is about the same as finding rough to cuts super ideals from.
Are you willing to pay ags0 prices for a well cut oec?

 

[Dancing Fire]

sounds neat Garry!! can''t not wait to see some pix.

 

[Pandora II]

Surfgirl and I were inventing the ''Surfdora'' - a new brand of modern OECs...

sadly still only in our dreams - unless you''ve been up to some thing SG

 

[elmo]

Date: 5/14/2008 2:44:48 AM
Author: strmrdr
Are you willing to pay ags0 prices for a well cut oec?

I''d like to see some valid statistics for crown and pavilion angles for OECs as they were typically cut the better part of a hundred years ago. I expect that DG will say there were no rules but I expect it''s not a random distribution either. My uneducated hunch is that on average the stones were significantly steeper and deeper than the average ags0. If so, yield would be significantly better. If yield is better it wouldn''t make sense to pay ags0 prices for stones cut today in an old style. It would certainly be smart marketing though

.

 

[strmrdr]

Date: 5/14/2008 11:17:48 AM
Author: elmo

Date: 5/14/2008 2:44:48 AM
Author: strmrdr
Are you willing to pay ags0 prices for a well cut oec?

I''d like to see some valid statistics for crown and pavilion angles for OECs as they were typically cut the better part of a hundred years ago. I expect that DG will say there were no rules but I expect it''s not a random distribution either. My uneducated hunch is that on average the stones were significantly steeper and deeper than the average ags0. If so, yield would be significantly better. If yield is better it wouldn''t make sense to pay ags0 prices for stones cut today in an old style. It would certainly be smart marketing though

.

Because of the high crown and shallow pavilion, cutting yield is down from the typical RB for the total recovery from the rough.
When it comes to yield pavilion weight is generally free, crown weight is expensive.
Also less rough selection that will allow a decent return for the cutter will raise the prices.
Without getting into a lot of math right around ags0 prices is likely what it will take.

 

[strmrdr]

The arrows point in the directions of better yield.
Look at the locations of the combos with the most red in the above images and note that the modern cut is moving in the right directions for rough recovery compared to the oec.

 

[elmo]

Date: 5/14/2008 12:31:52 PM
Because of the high crown and shallow pavilion...

I'm not talking about what models the best, but rather what was typical for the period, and typical when someone walks into an antique store and says hey that's a nice looking OEC. I'm not convinced yet that the pavilion is normally that shallow with real antiques. I'm not stating one way or another just looking for some input from the folks here who run sarin reports on these on a regular basis.