This is a 16th-17th century emerald ring carved from an entire piece of emerald. The gold band is a later addition
The phenomenal ring was part of the collections of Lyn Revson and later the jewelry connoisseur Lily Safra.
It was sold at Christie’s Maharajas & Mughal Magnificence sales in June 2019 for $663,000 while estimated at $100,000 – $150,000.