This lovely unheated sapphire comes from Umba, Tanzania, and is a gorgeous sky blue. The gem is 100 percent natural and untreated in any way. This sapphire appears to be nearly flawless. There are no visible inclusions, even when examined with a 10x loupe.
This sapphire is faceted in a modified version of the classic diamond round brilliant design that is optimized for sapphire; the result is a glittering beauty of a gemstone. It weighs 0.85 carats and measures 5.6 x 3.7 mm, the perfect size for an engagement ring.