4.34-Carat Deep Blue Montana Sapphire (Heated)

4.34-Carat Deep Blue Montana Sapphire (Heated)



A beautiful deep blue heated Montana sapphire in a classic brilliant oval design, 4.34 carats.

In stock


This beautiful heated Montana sapphire is a deep blue to blue-green color–a classic Montana sapphire color.  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.  There a few tiny feathers in the gem, just barely visible without a loupe, and a slight haziness that remains after the heating.  That said, in the hand its a gorgeous stone and the flaws are minor detractions.  I have factored them into the price, making this a great value for the size–this is very large for a Montana sapphire.

This sapphire is faceted in my custom version of a classic oval brilliant design that I’ve designed and optimized for sapphire; the result is a glittering beauty of a gemstone.  The gem weighs 4.34 carats and measures 10.9 x 8.7 x 6.1 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/