LB123
Rough_Rock
- Joined
- Jan 12, 2010
- Messages
- 20
You are probably correct on the OEC call...Date: 4/12/2010 6:09:28 PM
Author: Circe
I'd say OEC. An OMC should be cushion-shaped, and a round brilliant would have much longer pavilion facets.
P.S. - That is a gorgeous ring! I love the half-moon decorations ....
Date: 4/12/2010 6:28:42 PM
Author: DiaGem
You are probably correct on the OEC call...Date: 4/12/2010 6:09:28 PM
Author: Circe
I''d say OEC. An OMC should be cushion-shaped, and a round brilliant would have much longer pavilion facets.
P.S. - That is a gorgeous ring! I love the half-moon decorations ....
But, OMC (Old-Mine-Cut''s) are not necessarily ''Cushion shaped'' but rather an identification of a cutting style and not shape.
GIA is the main cause of confusion as they classify OMB (Old-Mine-Brilliant''s) as Old-Style/Cut Cushion shaped based on 3 out of 4 criterias needed which actually dont have anything to do with the shape itself! Actually a mystery to me why GIA chose this wrong path.
OMC''s means Old/Antique Cut facet design..., and basically every and/or any shape which was cut from/to the natural shape of the rough fits the OMC call!
There is a lot of confusing on this issue..., I am hoping its clearer now.
Its definitely not an Old Mine Cut those are not natural edges they are rounded which is post the OMC era.Date: 4/12/2010 5:27:23 PM
Author:LB123
Hi all. I'm back with better pics of my stone. It does have a culet, I just can't see it with my naked eye.
The appraisal came back as an OEC. The seller described it as a OMC, but the GIA report says it's a RB, LOL. What do you think the cut is? Appreciate any opinions!
GIA inclusion plot diagrams are not drawn to scale, they are meant for showing the location and size of inclusions not for definitive identification of facet structure.Date: 4/12/2010 7:24:52 PM
Author: Circe
Date: 4/12/2010 6:28:42 PM
Author: DiaGem
You are probably correct on the OEC call...Date: 4/12/2010 6:09:28 PM
Author: Circe
I''d say OEC. An OMC should be cushion-shaped, and a round brilliant would have much longer pavilion facets.
P.S. - That is a gorgeous ring! I love the half-moon decorations ....
But, OMC (Old-Mine-Cut''s) are not necessarily ''Cushion shaped'' but rather an identification of a cutting style and not shape.
GIA is the main cause of confusion as they classify OMB (Old-Mine-Brilliant''s) as Old-Style/Cut Cushion shaped based on 3 out of 4 criterias needed which actually dont have anything to do with the shape itself! Actually a mystery to me why GIA chose this wrong path.
OMC''s means Old/Antique Cut facet design..., and basically every and/or any shape which was cut from/to the natural shape of the rough fits the OMC call!
There is a lot of confusing on this issue..., I am hoping its clearer now.
Huh, really? That''s fascinating! Come to think of it, almost every illustration I''ve seen has been of a form to fit perfectly within a natural octahedron (I am guessing the more unusual shapes resulting from different rough wouldn''t be used as the baseline for line drawings). Thanks for pointing that out, DiaGem - any chance you have pics?