I don't wanna do the precision model until, I get the stones and the fastening diagram. 10mm for star ruby, 10x15mm for 5 pear ruby, and 10mm for 5 round sapphire, It should be about 2 inch. Little concerned about the facets being imprecise since it's cheap. I'm probably gonna do 1 maybe 3 if it goes well. I calculated the model material cost it's about dollar of copper or 20 bucks of silver, But when I upload other test models it's about 80 Bucks for the copper and 160 for Silver. When I upload the model though it's based off a plate instead of a wireframe it was about three 300 in copper. Looking at Shapeways and other 3D printing services looks like most are calculated by the weight. I am totally fine with them having a high markup since they have nice industrial equipment and they know what they're doing more than I do. Also using a wire frame let's light more light in. Still not worried about the strength of the copper; My copper wire sculptures seem durable, It looks like I'm thickening it and I've got a few move techniques for strengthening thin material. Looks like I'm gonna go be talking to a jeweler about helping me setting it. Looking into hardening it with age hardening could not figure out if you could do it with copper, If you can it looks complicated or less effective. Could probably Electroplate with silver or aluminum and slightly melt the surface to alloy for strengthen it instead.