1.70-Carat Light Sky Blue Montana Sapphire (Heated)

1.70-Carat Light Sky Blue Montana Sapphire (Heated)



A lovely sky blue heated Montana sapphire in a custom square cushion design, 1.70 carats.

In stock


This beautiful heated Montana sapphire is gorgeous sky blue 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. This gem has excellent clarity, giving it wonderful brilliance in the hand.  There is one small feather visible in the macro image that is also just barely visible in person, but only if you look very closely for it.  I have factored it into the pricing, making it a great value for the size and color.

This sapphire is faceted in my custom “Aurora” brilliant square cushion design that I’ve created and optimized for sapphire; the result is a glittering beauty of a gemstone.  The gem weighs 1.70 carats and measures 6.2 x 4.6 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/