2.89-Carat Deep Blue-Green Montana Sapphire (Heated)

2.89-Carat Deep Blue-Green Montana Sapphire (Heated)


A beautiful deep blue-green heated Montana sapphire in my custom “Helena” brilliant oval design, 2.89 carats.

Out of stock


This beautiful heated Montana sapphire is a deep rich blue-green color, and also shows zones and flashes of green on the blue-green background.  The color was developed by heating the gem in Montana, but no other treatments were made to the gem.  The treatment is permanent and stable and not only develops the color, but also improves the clarity.  The gem has some small internal feather inclusions visible in the macro image, but they are not visible in the hand without a 10x loupe–its eye clean.

This sapphire is faceted in my custom “Helena” oval brilliant design that has been optimized for sapphire; the result is a glittering beauty of a gemstone.  The gem weighs 2.89 carats and measures 9.2 x 7.6 x 5.6 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/