3.45-Carat Deep Green-Blue Montana Sapphire (Heated)

3.45-Carat Deep Green-Blue Montana Sapphire (Heated)



A beautiful deep green-blue heated Montana sapphire in my custom “Helena” brilliant oval design, very large for Montana at 3.45 carats.

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This beautiful heated Montana sapphire is a deep rich green-blue color, showing flashes of deep green and blue on a dark body 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.  The gem is free from any significant inclusions, but does still have a very slight amount of undissolved silk that slightly softens the brilliance and give the gem a bit of a “glow.”

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 3.45 carats and measures 9.8 x 8.1 x 5.9 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/