The sapphires found on the El Dorado Bar of the Missouri River in Montana are typically shaped such that the best shapes to cut are rounds or slight ovals, which is why these shapes are so commonly seen in these American gemstones. However, upon occasion I find pieces of rough that are suited for a cut-corner trillion design. This design is slightly tricky to execute, but has the advantage of being easy to set compared to most trillion designs. I created it specifically for Montana sapphire and the results are quite beautiful. This particular gem is a classic Montana color–a beautiful medium blue-green color. It is completely natural and untreated and has just a tiny bit of natural rutile “silk” that provides visual proof of its unheated condition.
The gem has a tiny internal feather on one side that is just barely visible in the image, but is not visible in the hand without a 10x loupe; its extremely clean and brilliant. I faceted this sapphire in a modified version of my custom trillian design called “Topangle.” It weighs 1.76 carats and measures 7.0 x 4.7 mm; the perfect size for an engagement ring.