0.64-Carat Sky Blue Montana Sapphire

0.64-Carat Sky Blue Montana Sapphire



A lovely sky blue unheated Montana sapphire, 0.64 carats.

Out of stock


This lovely unheated Montana sapphire is gorgeous sky blue color, like the “big skies” of Montana. The gem has just a slight amount of natural rutile silk that just slightly softens the brilliance of gem, and a few tiny crystal inclusions only visible with a 10x loupe–in the hand it’s an eye-clean gemstone.

This sapphire is faceted in a modified version of the classic diamond round brilliant design that is optimized for sapphire and cut to “hearts and arrows” precision; the result is a glittering beauty of a gemstone. The gem weighs 0.64 carats and measures 5.0 x 3.3 mm; the perfect size for an engagement ring.

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Product Enquiry

Do your gems come with certificates?

We're often asked about this, and yes, we do include our own certificate of origin and authenticity.  You can learn more here: https://www.earthstreasury.com/what-about-a-certificate/

Can I have a custom piece of jewelry made?

We LOVE making custom jewelry for our clients!  You can learn more about how the process works here: https://www.earthstreasury.com/the-custom-jewelry-process/

What is your return policy?

We have a one-week review and return policy that starts the date you receive your gem.  We want you to be 100% sure you have the right gem.  Learn more here: https://www.earthstreasury.com/risk-free-review-and-return-policy/