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Shown With 8mm Round Aquamarine

Aquamarine Celtic Crown Diamond Ring Set with 8mm Fine Round Aquamarine

Celtic knots embrace diamond accents on the shoulders of this romantic ring, while a delicate crown tops the center gemstone. ... Read More

Metal: 18K White Gold


Size Guide

Order now for delivery by Fri, Oct 1

Georgetown, Washington DC showroom entryway

Georgetown, Washington DC

3332 Cady's Alley NW
Washington, DC 20007


Daily: 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.
April 21, 2021
She said yes

She loved it. Cried a little. Got lots of hugs and kisses, among other things. ...Read More

July 6, 2020
Beautiful, Elegant, Feminine, Timeless!

I have always loved the look of antique rings, but was having trouble finding an actual antique that I loved (and fit my budget). I married into an Irish American family, so when I saw this ring with its heart-shaped diamond, celtic crown, and celtic love knots, I knew it was the perfect ring for me! It is so feminine and delicate and beautiful, and has that antique feel I was searching for. I'm obsessed with it - I liked the look of the ring with a smaller diamond (0.5 carat) which makes it seem very dainty and balanced. I don't think I'll find another one like it! ...Read More

November 7, 2019
Brilliant in every way !!!!

I purchased a Claddagh engagement ring from Brilliant earth and it was nothing short of remarkable. Being a person who 99% of the time likes to see what they purchase in person and the Importance of quality and workmanship. I contacted brilliant earth by phone and was greeted buy an amazing Young lady named Betsy. I mentioned that I was interested in a Claddah engagement ring and asked her what she had available. She directed me to a few different choices on the website while talking to me on the phone. After several minutes of speaking with her she kindly asked me the price range that I was looking to spend. I've been informed her oh my price range and she sent me several 360° photos of the rings that she had in mind and that I had in mind as well. it was not long after that that I made my decision on which ring it would be with no added pressure from Betsy at all she was remarkable over the phone to deal with and answered all my questions diligently. I kindly asked her opinion of the choice I was going to make I could feel she was replying very honestly which made me feel very comfortable in my decision. She informed me that the ring would be sent when the diamond was mounted and that I had time to have it resized for free. When the ring arrived I knew I had made the right decision and that Betsy had directed me to exactly what I wanted. Having looked at several other rings I found that brilliant earth was the very best to deal with there was no pressure to make a decision. My fiancé loves the ring and when I told her of the meaning behind it she was ecstatic. Thank you Betsy and all of brilliant earth for your prompt helpful friendly service and thank you very much for helping me choose such a beautiful ring. ...Read More

Order Details

*Estimated delivery time if ordered by 2 PM PT tomorrow

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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