This is a remarkable sapphire for Montana–deep blue and large. This comes from the El Dorado Bar on the Missouri River, outside of Helena, Montana. While famous for sapphires, most are lighter blue or greenish blue. Very few are a natural deep blue like this one, and even fewer are deep blue, large and clean enough to facet a gem. That makes this gem special and a real rarity. When I got this piece it looked like a greenish sapphire–until I located the c-axis of the crystal and realized it was a deep blue if oriented correctly. I decided to cut a very deep round to follow the shape of the rough, and designed this mixed cut to achieve that goal. The result is like a faceted drop, although it could be set in a ring by a skilled goldsmith.
While it can appear dark, in most light its a gorgeous deep denim blue color and flashes a lighter shade of blue as its moved around in the hand. There’s a slight bit of silk near the table that cuts down the brilliance a little bit, but its not significant. The gem is very large for a Montana sapphire at 3.90 carats and 7.47 x 7.45 mm.