This gorgeous unheated Montana sapphire is an unusual bright mint green color–an uncommon color for a Montana sapphire. There is a tiny bit of very fine silk in this sapphire that is visible as just a slight softening in this image, but its not visible in the hand, and requires at least a 20x loupe to resolve. Also visible in the image are some fine lines–those are boehmite inclusions, only seen in the Missouri River Montana sapphires. They are not visible without a loupe, but are quite beautiful in their own right when viewed under a microscope. These inclusions are all too small to impact the brilliance of the gem; its very bright and flashy in the hand.
I faceted this sapphire in a custom oval design that I created just for Montana sapphire. I’ve named the design “Helena” in honor of the capital of Montana, located just a few miles from the famed sapphire deposits of the El Dorado Bar on the Missouri River, where this sapphire came from. This gem is fairly large for a Montana sapphire: it weighs 2.64 carats and measures 8.2 x 6.9 x 5.6 mm.