Hello to the group,
Here is a photo of a bottle stopper I turned recently that has been inlaid with (24) 2.5mm Cubic Zirconia (Diamond Simulants), set in solid 18kt White Gold. Outside diameter of each stone is 3.18mm. The stopper body is made from a blue swirl acrylic acetate stopper blank, polished to 12,000 grit with Micromesh wet/dry abrasives.
The holes for the 2.5mm CZ's were drilled using a McNaughton (Kelton) ornamental jig, using a large Foredom hand piece to hold the 2.6mm drill bit. Holes were drilled approximately 1.85mm deep at 18,000 RPM. CZ (bezel hollow closed) presets were inlaid with thick set Cyanoacrylate ester adhesive. Top coat is Renaissance microwax, buffed at 3,000 RPM.