2.77ct Untreated Silky Montana Sapphire Six Prong Evergreen Hidden Halo Solitaire in 18k Yellow Gold


Mermaid Montana sapphire and diamond ring! Cast in 18k recycled gold, we have set a rare, 2.77ct untreated Montana sapphire in a stackable six prong setting with a "halo" of natural white diamonds in the gallery rail. A friendly, fun detail from the side.

This ring stacks well with most bands of a similar thickness.

Center Stone Details:

  • Gemstone: Sapphire
  • Hardness: 9/10, great for everyday wear!
  • Origin: Montana, Missouri River, USA
  • Carat Weight: 2.77ct (naturally rare, larger size for finished stones from Montana)
  • Shape + Cut: Round, speciality cut
  • Dimensions: 8.27x5mm
  • Treatment: Totally natural/untreated
  • Color Notes: Medium saturation of light blue with teal. Will shift in different lighting and "glow" from the internal silk
  • Inclusions Notes: Natural, even silk and some swirly inclusions. Common for untreated sapphires from this region! The particular pattern of silk in this stone looks like a "silk print" (finger print) when viewed from a specific angle.

Accent Stone Details:

  • Gemstone: Diamonds, Natural Conflict-Free
  • Hardness: 10/10
  • Shape + Cut: Round Brilliant 
  • Dimensions: 1mm
  • Color Notes: White, GH/SI1

Setting Details: 

  • 18k Yellow Gold - Polished with Evergreen hand carved texture (carved by Jennifer)
  • Approx Band width: 1.9-2mm
  • Six Claw style prongs on the center stone
  • Stackable
  • Size 6 - Resizable at no extra charge. Once resized, however, it is non-refundable. If you would like us to resize it, please select your desired ring size in the dropdown on this listing
  • Add a satin finish at no additional cost!


  • The ring is modeled on a size 5 finger
  • All of our diamonds are natural, untreated stones that are ethically mined and responsibly sourced. If the diamond was sent to a lab for a certificate, it will be noted in the description and the certificate will be shipped with your finished piece. If your diamond was not sent to a lab when it was with our supplier, you can purchase an appraisal for your finished ring and a third-party appraiser will list all of the diamond and ring details for your records and your insurance purposes.


  • We ship within 1-3 business days if there are no resizes or changes.  
  • Please allow an additional 5-14 business days for resizing and/or appraisal. 

Only 1 piece in stock!

Montana, USA


Rings will ship in an Anueva Jewelry ring box, with the exception of plain metal bands which will ship in a ring pouch. The package will be insured and require signature confirmation. Please be sure to use an address that will have someone available to sign during mail delivery times. If providing a business address, please include the business name.

International Shipping

Please be aware your country might require additional duties/taxes. We are not held responsible for any delays or fees charged by customs/duties in your country. The buyer is responsible for any additional taxes, duties, or brokerage fees. Customers are welcome to find and use a customs broker to help with international shipping. If you are going to work with a customs broker, please provide us with their information when confirming shipping.


If you would like to have the ring appraised, there is a $150 appraisal fee that you can add to cart here. We will take the ring downtown to be appraised by a third party GIA gemologist appraiser and provide details for your insurance purposes.

Help fight climate change with this purchase! Trees are like the lungs of the planet...our "natural air purifiers." They breathe in carbon dioxide and breathe out oxygen. Additionally, they provide habitat for birds and other wildlife and play a vital role in our natural water cycle. Forests help regulate the water in the air through a process called transpiration. They absorb thousands of gallons of water into their roots. Excess water is then released through the leaves back into the air. For every purchase made, I donate one planted tree through Plant-It 2020. Small changes by individuals can make a difference in the fight against climate change. 

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