1.78-Carat Light Sky Blue Montana Sapphire (Heated)


A beautiful light sky blue heated Montana sapphire in my custom “Helena” brilliant oval design, 1.78 carats.

In stock


This beautiful heated Montana sapphire is a lovely light sky blue color, one of my favorite hues to be found in the Montana gems.  The color was developed by heating the sapphire 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 sapphire has a few tiny inclusions and a veil that is tucked off near the edge, but they are not visible without a loupe–it’s an eye-clean gemstone.

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 1.78 carats and measures 7.8 x 6.3 x 4.8 mm.  Sapphires this large are very rare from Montana–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/