This is a Beautiful, Premium Burmese Blue Sapphire / Zircon Cocktail Ring. 

This ring is Platinum over Fine Sterling Silver and is made up of the following: 

2.60ct Sapphire Varied mm

0.45ct Zircon 1-1.5mm

These Sapphire have had no enhancement

Both are natural, earth mined gemstones.

New, never worn from a smoke & pet free home. Size 6