PLATINUM, DIAMOND, AND RUBY AND SAPPHIRE CABOCHON RING.early 20th century. One, oval ruby cabochon and one oval light blue sapphire cabochon of matching size, each surrounded by 12 round diamonds in twin-oval setting with six additional round diamonds; diamonds of mixed cut including old mine-cut and European-cut, and transitional modern brilliant-cut. - RIng size: 6. Estimate $300-400
Condition: Ruby and sapphire exhibit surface abrasion.
