Moissanite Luxe Rhiannon Three Stone Diamond Ring (3/4 ct. tw.) in 18K Yellow Gold
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Moissanite Luxe Rhiannon Three Stone Lab Diamond Ring (3/4 ct. tw.) Set with 7mm Super Premium Colorless Cushion Moissanite

Two luxurious emerald-cut diamonds rest alongside the center gemstone in this classic, sophisticated ring (3/4 total carat weight). ... Read More

Metal: 18K Yellow Gold


Size Guide

Order now for delivery by Tue, Jun 13

Fairfax – Mosaic District showroom entryway

Fairfax – Mosaic District

2905 District Ave #105
Fairfax, VA 22031


Mon-Sat: 10am-7pm; Sun: 11am-6pm

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Ring Information

18K Yellow Gold
Prong metal:
18K Yellow Gold
Average width:
1.5 mm

Accent Gemstones

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

Center Gemstone

Average DimensionsAverage Dimensions:
7.0 x 7.0 mm
Average ColorAverage Color:
Average ClarityAverage Clarity:
Lab Created

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 17, 2023
Kinley's mom
Better than I imagined

I purchased this ring as a gift for myself and it's more beautiful than I imagined. The entire process was easy and fun. I appreciate all the assistance I got in selecting and receiving my purchase. And now I love looking at my hand and seeing this beautiful piece every day. ...Read More

December 29, 2022
Mrs. Witch

I shared three permutations of this ring with my fiance and left it to him to choose the one he liked best. He chose an unheated teal sapphire center stone that he felt matched my eyes to go with the 3/4 ct tw side diamonds. I have small hands (size 4), and this ring is neither too small or too large. It's my DREAM ring -- elegant, stylish and classic! < 3 ...Read More

Order Details

*Estimated delivery if ordered by 2 PM PT today

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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