3.80-Carat Robin's Egg Blue Montana Sapphire

3.80-Carat Robin’s Egg Blue Montana Sapphire



A beautiful rich robin’s egg blue unheated Montana sapphire in my “Bella” custom square cushion design, 3.80 carats.

In stock


This gorgeous unheated Montana sapphire is a rich blue green color reminiscent of the eggs of the American Robin or like a tropical sea.  While the macro image shows some inclusions and some fine rutile silk, neither of these are visible without a 10x loupe, although the silk does give the gem a slightly softened “glow.”  It is an eye clean gemstone and quite bright and flashy in the hand.

This sapphire is faceted in my custom “Bella” brilliant square cushion design that I’ve created and optimized for sapphire; the result is a glittering beauty of a gemstone.  The gem weighs 3.80 carats and measures 7.9 x 6.4 mm–quite large for a Montana sapphire.  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/