Ideal Cut for Emerald + Facetting Diagram

[GEMMYJANE]

Hi all,

I would like to custom cut a Colombian emerald, but our cutter normally cuts their emeralds rather shallow which leads to excessive windowing of the stones.
Can you suggest a facetting style/diagram (with precise angles, number of facets, etc.) for an emerald cut emerald, which maximizes light return and colour and minimizes windowing?

Thanks,
Jane

 

[minousbijoux]

Hi and Welcome! Since your question is more trade related (we are more of a consumer board, so don't seem to have discussions on detailed faceting diagrams), I would check the offerings here, where they have a dedicated area for lapidaries: https://www.gemologyonline.com/Forum/phpBB2/viewforum.php?f=8&sid=f2e05b778ac9c6ef8a1f784a0da85e01