1.53-Carat Royal Blue Montana Sapphire (Heated)

1.53-Carat Royal Blue Montana Sapphire (Heated)



A beautiful rich royal blue heated Montana sapphire in our custom “Serendipity” brilliant oval design, 1.53 carats.

In stock


This beautiful heated Montana sapphire is a gorgeous deep royal blue color a very rare color for the Montana gems. 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 sapphire has one tiny feather inclusion that is just barely visible to the naked eye if you search very closely for it.  At a normal viewing distance it is not visible.  The inclusion has been factored into the price, making this sapphire a great value for the size and color.

This sapphire is faceted in our custom “Serendipity” brilliant oval design, created and optimized for sapphire; the result is a glittering beauty of a gemstone. The gem weighs 1.53 carats and measures 7.5 mm x 6.1 mm x 4.5 mm; the perfect size for an engagement ring.

Additional information

Weight 1 oz
Dimensions 3 × 2 × 1 in

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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/