midheaven collection

Mare Nubium Emerald Ring Suite

$11,900.00 USD


Long ago it was believed that there were beautiful seas and lakes of water on the moon that were visible from Earth.  Galileo looked through his telescope and named them all. This ring is named after one of those lakes, the Mare Nubuim.

A bold and classic style with an ancient silhouette, created here with deep green emeralds, and cast in solid 18k recycled yellow gold.

The subtle flare and sculpted style on the ring shank refers to an old European style of ring that is comfortable to wear, and nests perfectly with the Midheaven collection.


    1.  Choose Your Solitaire - Browse our curated selection of GIA certified natural and lab grown diamonds below.  Our diamond inventory is live and updated daily. 

    2.  Choose Your Contours - Select your choice of precious metal alloy from our true tone color swatches.  Your size will be confirmed by our Custom Fit and Sizing service after purchase.

    3.  Add To Cart - Make sure both your diamond and setting are in your cart when you check out, and we will take care of the rest.  Our Concierge will confirm your true ring size after purchase.

    If you are looking for a colored diamond or sapphire we are happy to help, our DIAMOND CONCIERGE can help you explore all the options.

    Questions about creating a suite? BOOK A CONSULTATION 

    ◗ The Mare Nubium Emerald ring

    ◗ Contour no 2 with Emeralds

    ◗ The Radiant Crescent moon contour ring

    Need help building a ring suite?  Our Client Concierge is here to help!

    Mare Nubium Emerald ring
    ◖ Featuring a 1.2ct oval cut emerald, held securely with a modified bezel design

    ◖ Our emeralds are hand selected individually for best luster and brilliance.

    ◖ Set with 0.28cts of brilliant cut round emerald pave down the side of the band.

    Contour ring No 2 in solid 18k yellow gold
    ◖ A delicate arc of 1.5mm gorgeous green emeralds curve on your finger

    ◖ Set with 0.22cts of brilliant cut round emerald pave down the side of the band.

    Radiant Crescent Moon contour ring in 18k gold
    ◖ A delicate crescent moon to adorn your finger.

    ◖ Set with 0.05cts of brilliant cut round white diamond pave.

    Our Midheaven Collection engagement rings are Bespoke, custom made to order for you in your exact ring size and set with a select lab grown or natural diamond of your choosing.  GIA Diamond Certifications and fine jewelry evaluation reports are sent digitally with your finished piece.

    Available ring sizes are whole, half and quarter US sizes ranging between size 3 to size 12.  

    Our Concierge will contact you to confirm your true sizing after purchase. Feel free to Contact us here anytime with any questions about the Bespoke process.

    View our complete FAQ page here

    At 12th HOUSE we provide an exclusive Custom fit and Sizing service to ensure your new ring will fit you perfectly. 


    Upon purchasing your ring you will receive a complementary Sizing kit with instructions on how to measure your finger exactly, and confirm the sizing is absolutely perfect before your ring is made.

    After confirming your exact ring size we will begin crafting your custom-made piece in our studio.

    bespoke consultations

    Choose from our premium selection of GIA certified ethically mined or lab grown diamonds, and find your true ring size through our Custom Fit and Sizing service.

    ◖This is Bespoke Fine Jewelry◗

    At 12th HOUSE we are passionate about making the most beautiful and magically centered jewelry for our clients, your treasured heirlooms that will be cherished for years to come.

    Contact for Consultation