0.99-Carat Robin's Egg Blue Montana Sapphire (Heated)

0.99-Carat Robin’s Egg Blue Montana Sapphire (Heated)


A gorgeous heated robin’s egg blue Montana sapphire in a classic diamond round brilliant cut, 0.99 carats.

In stock


This Montana sapphire is a beautiful bright robin’s egg blue color–a classic Montana sapphire color.  The color was developed by having the sapphire heated in Montana–but that is the only treatment it has had.  The heating not only developed the color, but it also improved the clarity by dissolving the rutile silk.  While the macro image shows some inclusions in this sapphire, it looks much better and more lively in the hand.  The inclusions are not visible without a loupe–its an eye clean gemstone.

This sapphire has been cut in the classic diamond round brilliant design, optimized for sapphire.  The result is a sparkling gem weighing 0.99 carats and measuring 6.0 x 3.8 mm.  This would make a lovely center stone for an engagement ring.

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Product Enquiry

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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/

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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/