0.36-Carat Colorless Montana Sapphire

0.36-Carat Colorless Montana Sapphire



A beautiful colorless Montana sapphire in our custom “Helena” brilliant oval design, 0.36 carats.

In stock


This gorgeous Montana sapphire is completely colorless, a relatively rare find for the Montana sapphires.  Completely natural and untreated, this is the color of the gem just as it formed deep in the earth, millions of years ago. This sapphire has excellent clarity, with just a tiny amount of natural rutile “silk” only visible with a 10x loupe.  Unheated natural sapphires with excellent clarity like this are quite rare; each year we are only able to cut about 5-7% of our rough without having it heated.  Color-change sapphires like this one are rare; each year we mine only a handful at our mine in Montana.

This gem is faceted in our custom “Helena” brilliant oval design, created and optimized for sapphire; the result is a glittering beauty of a gemstone. The gem weighs 0.36 carats and measures 4.6 mm x 4.0 mm x 2.8 mm.

Additional information

Weight 1 oz
Dimensions 3 × 2 × 1 in

AGTA Enhancement Code

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Length (mm)

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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/