3.11-Carat Deep Blue-Green Montana Sapphire


A beautiful deep blue-green unheated sapphire from Montana, very large for the locality at 3.11 carats.

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This remarkable unheated sapphire is a beautiful rich, deep blue-green color.  While this is a classic Montana color, it is very rare in an unheated sapphire and even more rare in one this large!  It has excellent clarity, with just a tiny amount of natural rutile silk and a tiny crystal inclusion, neither of which are visible except with a 10x loupe.  Very few Montana sapphires are large enough to facet a stone of this size; combined with the color and the fact that it is unheated/untreated, this is truly a rare and remarkable stone.

This sapphire is faceted in the classic diamond round brilliant design, cut to “hearts and arrows” precision.  It weighs 3.11 carats and measures 8.5 x 5.7 mm.  It would make an amazing center stone for a beautiful engagement ring!

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