Aquamarine Cometa Three Stone Diamond Ring in 18K White Gold
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Aquamarine Cometa Three Stone Diamond Ring Set with 8mm Fine Round Aquamarine

Elegant and chic, this three stone ring features two kite-shaped diamond accents alongside a center gemstone cradled by lustrous claw prongs. The sleek, sophisticated band gently tapers down into a low dome for increased comfort. ... Read More

Metal: 18K White Gold


Size Guide

Order now for delivery by Tue, Apr 11

Bethesda Row, Bethesda showroom entryway

Bethesda Row, Bethesda

4733 Elm Street, Fl 4
Bethesda, MD 20814


Thurs-Mon: 10am-7pm

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Ring Information

18K White Gold
Prong metal:
18K White Gold
Average width:
1.5 mm
Rhodium finish:

Accent Gemstones

Min. carat total weight Min. carat total weight:
Prong Set
Average ColorAverage Color:
Average ClarityAverage Clarity:

Center Gemstone

Average DimensionsAverage Dimensions:
8.0 x 8.0 mm
Average ColorAverage Color:
Average ClarityAverage Clarity:
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Luxury with a Conscience®

A ring that evokes the happiness of love and partnership is even more joyful when you know that it was sustainably sourced and mindfully produced. From our mission to our unique jewelry designs, everything at Brilliant Earth is held to exceptional standards.

Our engagement ring settings are made-to-order with each one handcrafted for your selected center gem’s unique characteristics to ensure the high quality of the finished piece.
As part of our commitment to protecting the planet, Brilliant Earth is Carbonfree®. We calculated our carbon footprint by assessing the direct emissions of our energy use, including packaging, shipping, and employee travel and commuting. Then we partnered with to offset our carbon emissions by contributing to Tropical Rainforest Conservation in Brazil. We will continue identifying ways to reduce our footprint and offsetting emissions that we cannot eliminate.
We present each Brilliant Earth design in a jewelry box crafted of wood from Forest Stewardship Council (FSC) certified forests—trees that are managed and harvested in a manner that protects and maintains natural communities and respects the rights of workers and indigenous people.
March 18, 2023
Absolutely Stunning and Elegant♡

I am in love with my ring!! He got a 1.96 ct Emerald Diamond. Our experience ring shopping here was easy and everyone was very accommodating. ...Read More

March 8, 2023
Would recommend

The ring is beautiful and all the people who helped us along the way were super helpful and informative! ...Read More

January 12, 2023
Exceeded Our Expectations

Brilliant Earth met its goal by exceeding our expectations. Brilliant Earth's staff was knowledgable, friendly and kept us informed. There was absolutely no pressure to buy. Additionally, it was important for us to be able to visit a jewelry store and look at the many settings and stone options. We did not want to take a chance by using an online only company where you were guessing at how the ring would look and the customer support should there be issues with the purchase. One more comment, and it is a big one, is the price was extremely good. In summary, my fiancé loves the ring and we recommend Brilliant Earth... they have many stores... visit one before you make a choice. ...Read More

Order Details

*Estimated delivery if ordered by 2 PM PT today

Free FedEx Shipping

Free 30 Day Returns

Easy monthly payments with Affirm. From 0% APR financing. Up to 36 months. Subject to credit approval.

Special 12 month financing options available with Wells Fargo, subject to credit approval.

Layaway options also available.

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Gemstone engagement ring in box