1.78-Carat Deep Blue Montana Sapphire (Heated)

1.78-Carat Deep Blue Montana Sapphire (Heated)



A beautiful deep blue heated Montana sapphire faceted in my custom “Testudo” brilliant oval design, 1.78 carats.

Out of stock


This beautiful heated Montana sapphire is a rich, deep blue that brings ocean depths to mind. The sapphire has excellent clarity, making it scintillating in the hand. Sapphires with this rich shade of blue and high clarity are quite uncommon from Montana.

This sapphire is faceted in my custom “Testudo” brilliant oval design. The gem weighs 1.78 carats and measures 7.8 x 6.0 x 4.9 mm.  It would make a gorgeous center stone for an engagement ring.

Additional information



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AGTA Enhancement Code

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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/