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Sapphire Four-Prong Comfort Fit 1.5mm Ring Set with 5.5mm Premium Blue Round Sapphire

Petite and delicate, this classic four-prong solitaire engagement ring has a rounded inside edge for increased comfort.

Please note that rings ordered in 18K white or 18K yellow gold will feature an 18K band and 14K head. ... Read More

Holiday Badge

Delivery by Christmas

Metal: Platinum

$2,070

Order now for delivery by Thu, Dec 19

Fairfax - Mosaic District showroom entryway

Fairfax - Mosaic District

2905 District Ave #105
Fairfax, VA 22031

571.517.0880

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

Book An Appointment

Ring Information

Style:
BE1199-SBSL5.5RD2-PT
Metal:
950 Platinum
Prong metal:
Platinum
Average width:
1.5 mm

Center Gemstone

Type:
Sapphire
ShapeShape:
Round
Dimensions Dimensions:
5.5 x 5.5 mm
ColorColor:
Blue
ClarityClarity:
Eye Clean
Origin:
Sri Lanka
Treatment:
View

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.
We’re leading the jewelry industry towards clean energy. We use clean energy in our showrooms and offices, have displaced all other corporate emissions since 2018, and support wind and solar energy projects through collaborations that help address climate change.
Our packaging uses recycled materials made with less energy, less water, and fewer emissions. We make our iconic ring boxes with wood certified by the Forest Stewardship Council and design them to last lifetimes. Since 2021, we’ve used 100% recycled paper, saving hundreds of tons of CO2, and we’re shrinking our packaging even more to further reduce waste.
November 5, 2024
Rujaine's fiance
Stunning Ring and Stellar Service!

I couldn't be happier with my purchase of the 18K White Gold Four-Prong Comfort Fit 1.5mm Ring from Brilliant Earth! The ring is absolutely stunning in its simplicity and elegance. The 18K white gold has a beautiful, bright finish that catches the light perfectly. The quality is exceptional, with a sturdy four-prong setting that feels secure but doesn't overpower the delicate style of the ring. I appreciate Brilliant Earth's commitment to ethical sourcing, too as it adds an extra layer of satisfaction to my purchase. Overall, it's a beautiful, timeless piece that my fiancé will cherish for years. Highly recommend! ...Read More

April 5, 2024
DiamondStarer!
Most Beautiful Diamond in the World!

I got the best 1/2 ct diamond I could find instead of a poor 1 ct diamond, and your site helped me do just that. No pressure tactics or buying leftover stock. I got to pick my diamond, and the fact that you show it close up without hiding the flaws is awesome. People are jealous of its brilliance! ...Read More

April 1, 2024
A's Wife
✨Absolutely Stunning!✨

I have gotten so many compliments on my engagement ring! Husband bought me my dream ring from BE and I'm in LOVE! Love the thin band (1.5mm) but there's a thickness to it that makes me feel comfortable and confident that it won't easily break from being too dainty like other dainty pieces. Definitely do your research on the 4 C's! It will help you be prepared before your appointment and will make the choosing of your diamond/ stone that much more fun! We decided to go with a lab grown diamond: 1.58ct, E color, VS1, Super Ideal cut (with hearts and arrows). ...Read More

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*Estimated delivery if ordered by 2 PM PT today

Free FedEx Shipping

Free Extended Holiday 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 ring on wooden jewelry box.