1.37-Carat Blue-Green Montana Sapphire

1.37-Carat Blue-Green Montana Sapphire



A beautiful blue-green unheated Montana sapphire faceted in my custom Helena brilliant oval design, 1.37 carats.

Out of stock


This beautiful Montana sapphire is a gorgeous rich blue-green color–a bit more green than blue in this particular gem.  The gem has very good clarity, with just a few tiny feathers only visible with a 10x loupe.  I have factored them into the pricing, making this a great value for the size. The high clarity makes this gem very bright and scintillating in the hand.

This sapphire is faceted in my custom oval brilliant design I created just for Montana sapphire.  The design is called “Helena” in honor of the capital of Montana, located near the sapphire mines on the Missouri River in Montana. The gem weighs 1.37 carats and measures 6.9 x 5.8 x 4.4 mm.

Additional information


, ,

Gemstone Origin

AGTA Enhancement Code

Gem Carat Weight

Gemstone Shape

Gemstone Design

Gemstone Artist

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/