6.99 Carat Blue TANZANIAN Cushion Color Change Sapphire GWLAB

This is a 6.99 carat sapphire of Tanzanian origin in a cushion cut, displaying blue color. The stone is untreated and offered as a loose stone. It has been examined by GWLAB, an independent gemological laboratory. The listing indicates potential color-change properties, which would require verification under different lighting conditions to confirm the degree and character of any shift.