old mine cut

[moshe gold]

hi
i am looking for information on "old mine cut" and on "old europeon cut".
do you know if the gia gives certificate to those stones for very good and excellent.
i also want to know the parameters of the very good and the excellent.
thank u,
moshe

 

[mrssalvo]

Hi,
if you do a search here a bunch of old threads will pop up with info on both of those cuts. A lot of older cut stones do not have GiA reports included unless someone paid to have it done. Also, older cuts were not necessary cut for optical symmentry so they don''t score very goods to excellents very often. My OEC was gorgeous but only scored a fair, by my appraiser.

 

[jteh]

hello!
i myself set out on a search for an oec earlier this year and was lucky enough to pick up a gia certed one. as mrssalvo said however, there are not many gia certified oecs out there - i''ve seen lots of egl certs.

dave atlas (oldminer on this forum) publishes a chart that can be used as a rough guide as to what parameters makes a good oec stone. i think it''s now published on his website http://www.gemappraisers.com/.

oecs/omcs, probably more so than round brilliants, are a type of stone that one really needs to see to judge. just because one doesn''t come up as having a good score or good measurements, doesn''t mean that it doesn''t look nice...they have quite a different look to round brilliants with their small tables and high crowns - some ppl say they look quite ''warm''

 

[moshe gold]

thank u for your answer,but do u know specific web sites about good proportions of
oec and omc?
i''ll appreciate any help.
moshe

 

[oldminer]

One of the charts on my website covers proportions of old European cuts. These are the round variety, not cushion cuts. Old cushion cuts are properly called old mine cuts and really there are no sets of proportions that are standard. Technology had not advanced to that stage back then. Now, today, we do have some well cut cushion shapes, but they look VERY different than old mine cuts.

 

[moshe gold]

hi mr.atlas
thank u for your answer, i find the table on your website and it is a great help
though i didn''t completly understand it,but i am working on it.
about the cushion,can u give me a general idea about the proportions of such a stone
from 18 century.
thank u again for your great help.
moshe