15.76 Carat Blue TANZANIAN Round Tanzanite GWLAB

This is a 15.76-carat round tanzanite of blue color, originating from Tanzania. The stone has been heat-treated, a standard practice in tanzanite processing to enhance and stabilize its color. It is offered as a loose stone and carries certification from GWLAB. The substantial carat weight and round cut make this suitable for a significant solitaire setting or focal stone in a custom design.