The diamond I am to buy will be in the .75 to .80 ct range, round, brilliant cut. I will design for 6 posts. What is recommended thickness per post, in palladium, please?

Which casting houses take CAD files in *.3dm format? Or better yet, can you recommend a known reliable one?

Should I design in the sprule and gates and a feeder...or leave that to the casting house?

What I get back from the casting house...can I polish that myself? And if so, how best to do that. I have a lapidary tumbler at home. At work we have polishing tools (but mostly for stainless steel).

Any other recommendations?

PS - Attached is a VERY preliminary design. The final engagement ring will be very similar, but I'm only just getting started on concepts.

Tags: engagement, jewelry, palladium, ring

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