This unusual heated Montana sapphire is a deep violet blue to purple color that changes depending on the light. In daylight, the color is a rich deep purplish-blue, while under incandescent light, it changes to a deep purple. It is eye-clean; the inclusion visible in the photo is impossible to see in the hand without a 10x loupe.
This sapphire is faceted in my custom “Testudo” brilliant oval design. The gem weighs 1.38 carats and measures 7.2 x 5.4 x 4.4 mm. It would make a unique and eye-catching center stone for an engagement ring.