Platinum Rubi and Diamond cluster ring

Natural Ruby in oval facetted cut, approximately 3.5 ct in a cluster of 16 Diamonds.
All stones are set in bezels and decorated with a precise millegrain. The ring crown is made of platinum. The band is made of 18K yellow gold.
Classic eternity ring with a Ruby in the lead role.
The ring has the initials of the goldsmith: PP.

Central stone: Natural oval facetted Ruby 11.08 x 8.79 mm
approximately 3.5 ct tested in the setting
Surrounding stones: 16 Diamonds x 2.5 mm approximately 1.1 ct G, Si-P
Weight: 5.26 g
Metal: Platinum and yellow gold 750, marked UPW
Size: PL 14 (17.5mm)