Jumbo Ametrine rough from Bolivia — showing the sharp natural boundary between purple amethyst and golden citrine caused by differing oxidation states of iron during crystal growth
20.526 grams / 102.63 carats / 23 x 26 x 15 mm / clean
Estimate: $425 - $450
Popcorn bidding is in effect: bids placed in the last 5 minutes will extend the auction by 5 minutes
