0.63-Carat Steely Blue Montana Sapphire


A beautiful steely blue unheated Montana sapphire in the classic round brilliant design, 0.63 carats.

In stock


This beautiful unheated Montana sapphire is a gorgeous steely blue color. This gem has very good clarity; there is one tiny inclusion only visible with a 10x loupe.  There is a slight sheen from natural rutile silk that can be visible as the gem is tilted; under a microscope the pattern of the silk is quite beautiful.

This sapphire is faceted in modified version of the classic diamond round brilliant cut, optimized for sapphire and cut to “hearts and arrows” precision.  It weighs 0.63 carats and measures 5.0 x 3.3 mm.  It would make an amazing center stone for a unique and one-of-a-kind 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/