Round lab diamond engagement rings are the classic choice for proposals, loved for their balanced shape and bright, timeless brilliance. Crafted in solid gold, with selected IGI-certified stones and photo/video updates of your ring being made.
I was nervous about buying a ring online but it seemed like it would be a wild goose chase trying to find an elongated hexagon moissanite engagement ring (which is what my now fiance wanted) so I took a chance with Brilliant Carats and I'm glad I did. The ring is high quality and the price can't be beat. I will be shopping with them again for a wedding band.
Ring Size- Avis
01/22/2026
Mary
Classic ring
The design is classic, the quality is amazing… I’m obsessed!
Oval Lab-Grown Diamond Solitaire Engagement Ring
12/09/2025
Alden E.
My wife is very happy
I just got my custom ring — it’s gorgeous! My wife loves it so much. The customer service team kept me updated the whole time, sending photos of every stage. They were super patient.
Big thanks to Brilliant Carats!
Oval Lab-Grown Diamond Solitaire Engagement Ring
12/09/2025
Cassidy Blake
Maybe purchase again.
Unique shape and such clear sparkle. Everyone thought it was a custom piece. Maybe purchase again.
Aegis | 1-3cts Hexagon Lab Diamond Ring with Iris Flora
11/02/2025
Faith Harmon
Shining Shining Shining
I’ve worn it non-stop for months — durable and still shines like new.
Long Hexagonal Cut Twist Band Engagement Ring
10/30/2025
Piper Lawrence
Stunning clarity for moissanite.
Stunning clarity for moissanite. Comfortable fit and the ring arrived in lovely packaging.
Emerald Cut Diamond with Baguette & Trapezoid Accents Set
10/29/2025
Jessica Wallace
I love this kite diamond ring
I love this kite diamond ring; the matched wedding band is perfect.
NEXUS Kite Cut Lab Diamond Regal Halo Bridal Set 2PCs
10/28/2025
Vanessa Burke
my new go-to
Pear moissanite is my new go-to. Looks high-end, the halo setting makes it pop.
Pear Cut Three-Stone Lab Diamond Engagement Ring
10/16/2025
Autumn Reeves
Love this hexagon moissanite ring.
Love this hexagon moissanite ring. Sparkle rivals my friend’s natural diamond.
Hexagon Cut with Classic Matching Band Bridal Set
10/13/2025
Amber McKinney
My partner loved it.
Stunning kite moissanite, it's sharp, sparkly, and very unique. My partner loved it.
NEXUS Kite Cut Lab Diamond Classic Grace Bridal Set 2PCs
10/11/2025
Shelby Quinn
Classy and timeless ring
Classy and timeless. Excellent cut, and the IGI certificate came with full details.
Pear Bezel Lab Diamond Ring in Solid Gold 1-3ct
10/04/2025
Jenna Whitfield
Amazing lab diamond ring.
Amazing lab diamond ring. The hexagon shape gives my ring a designer look.
Hexagon Cut with Classic Matching Band Bridal Set
10/02/2025
Naomi Barrett
This engagement ring is classic and elegant
This engagement ring is classic and elegant, with sharp, crisp facets, and the setting is beautifully finished. Would recommend it to my friends.
Emerald Cut Diamond with Baguette & Trapezoid Accents Set
10/01/2025
Nathan Fuller
Perfect proposal ring.
My fiancé cried! The stone looks incredibly natural. Perfect proposal ring.
Pear Cut Three-Stone Lab Diamond Engagement Ring
09/28/2025
Erin Caldwell
Comfortable for daily wear.
This hexagon diamond ring is exactly what I wanted — unique without being over the top. Comfortable for daily wear.
Hexagon Cut with Classic Matching Band Bridal Set
09/26/2025
The Classic Shape for a Reason
Round lab diamond engagement rings are known for balance, brightness and lasting appeal. The shape works across many personal styles, making it a strong choice when you want a proposal ring that feels familiar, refined and easy to love.
Need help?
Frequently Asked Questions
Q1. What makes a round diamond ring a classic choice?
A round diamond ring is loved for its balanced shape and strong light return. Its symmetry makes it one of the easiest styles to wear, and it remains a safe, refined choice for proposals across many personal styles.
Q2. Is a round lab diamond engagement ring a good choice for a proposal?
Yes. Round lab diamond engagement rings are a strong choice when you want something classic, bright and easy to love. The shape works well with solitaire, halo, pavé, twist and three-stone settings.
Q3. What is the difference between round solitaire, halo and pavé rings?
A round solitaire ring keeps the focus on the center diamond. A halo adds smaller diamonds around the center for more visible sparkle, while a pavé band adds fine diamond detail along the ring shank.
Q4. How is a round cut different from oval or cushion cut?
A round cut has a more symmetrical outline and a classic brilliant look. Oval cuts feel more elongated, while cushion cuts have softer corners and a more romantic shape. Choose round if you want the most familiar and balanced engagement ring style.
Q5. Are these round lab diamonds IGI-certified?
Selected round lab diamond rings feature IGI-certified center stones, and certificate details will be shown on the product page when available. If a specific certificate is important to you, please review the individual product page before ordering.
Q6. Are round lab diamond rings made to order?
Most round lab diamond rings are made to order in solid gold, usually requiring 7–10 working days before shipping. When applicable, we provide photo and video updates of your ring being made, so the process becomes part of the proposal memory.
Any question?
You can contact us through our contact page! We will be happy to assist you.
Solitaire, Halo, Pavé and Three-Stone Styles
This collection includes round solitaire, halo, pavé band, twist band and three-stone engagement rings. Choose solitaire for a clean classic look, halo for added sparkle, pavé for delicate detail, or three-stone for stronger symbolism.