This beautiful heated Montana sapphire is a rich deep blue to blue-green color–a classic Montana sapphire color. The color was developed by heating the gem in Montana, but no other treatments were made to the gem. The treatment is permanent and stable and not only develops the color, but also improves the clarity. There is just a tiny bit of softening from the remaining undissolved rutile silk, but it has no real effect on the brilliance and beauty of this gemstone. Sapphires from Montana rarely reach this size, and are even more rare in a round this size.
This sapphire is faceted in a version the classic diamond round brilliant design that has been optimized for sapphire; the result is a glittering beauty of a gemstone. The gem weighs 4.45 carats and measures 9.6 x 6.5 mm. It would make an amazing center stone for a unique and one-of-a-kind engagement ring!