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Marquise Cut Lab Diamond Ring

What if maximizing sparkle had a secret shape? It does... Discover exquisite marquise cut lab grown diamond rings in 14K/18K gold. IGI/GRC certified. Illusion of length.

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2 products

BCJXDMQK04-YG-01
BRILLIANT CARATS
Royal Artistic Marquise lab Diamond Bridal Ring Sale priceFrom $1,061.00 USD
Metal Type
BCJXDMQK03-YG-01
BRILLIANT CARATS
Baroque Style Marquise Lab Diamond Ring Sale priceFrom $1,165.00 USD
Metal Type

Let customers speak for us

from 91 reviews
Ring Size
Drew
100% Satisfied

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
Oval Lab-Grown Diamond Solitaire Engagement Ring
Mary
Classic ring

The design is classic, the quality is amazing… I’m obsessed!

Oval Lab-Grown Diamond Solitaire Engagement Ring
Oval Lab-Grown Diamond Solitaire Engagement Ring
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
Aegis | 1-3cts Hexagon Lab Diamond Ring with Iris Flora
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
Long Hexagonal Cut Twist Band Engagement Ring
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
Emerald Cut Diamond with Baguette & Trapezoid Accents Set
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
NEXUS Kite Cut Lab Diamond Regal Halo Bridal Set 2PCs
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
Pear Cut Three-Stone Lab Diamond Engagement Ring
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
Hexagon Cut with Classic Matching Band Bridal Set
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
NEXUS Kite Cut Lab Diamond Classic Grace Bridal Set 2PCs
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
Pear Bezel Lab Diamond Ring in Solid Gold 1-3ct
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
Hexagon Cut with Classic Matching Band Bridal Set
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
Emerald Cut Diamond with Baguette & Trapezoid Accents Set
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
Pear Cut Three-Stone Lab Diamond Engagement Ring
Nathan Fuller
Perfect proposal ring.

My fiancé cried! The stone looks incredibly natural. Perfect proposal ring.

Pear Cut Three-Stone Lab Diamond Engagement Ring
Hexagon Cut with Classic Matching Band Bridal Set
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

Marquise Cut Lab Diamond Ring Collection — Elongated Elegance, Ethical Sparkle

Discover the timeless sophistication of the marquise cut lab diamond ring — a bold and elegant choice for modern love stories. With its pointed ends and elongated silhouette, the marquise diamond delivers maximum sparkle, making the finger appear longer and the diamond itself appear larger.

This curated collection features IGI and GRC certified lab grown diamonds, available in sleek solitaire styles, delicate zoom stack settings, and classic engagement ring designs. All our marquise cut engagement rings are created to balance striking diamond shape with sustainable brilliance.

Why Choose a Marquise Cut Engagement Ring?

The marquise cut is more than a style — it’s a statement. Its regal silhouette and curved sides are designed to catch the light from every angle, producing an unmatched level of brilliance.

Benefits of the Marquise Cut:

  • Creates the illusion of a bigger diamond
  • Flat sides make it ideal for stack-friendly wedding bands
  • Flattering on all finger shapes and sizes
  • A symbol of elegance and individuality

Whether you're choosing a marquise diamond engagement ring or designing your dream ring, this cut adds grace and impact in equal measure.

Lab Grown Diamonds with Ethical Origins

All our rings feature 100% lab grown diamonds, expertly cut and certified by IGI or GRC. We do not use GIA certificates for this collection — only grading labs that specialize in lab created diamonds.

Why choose lab grown?

  • Identical in appearance and quality to mined diamonds
  • Sustainable and eco-conscious
  • Exceptional clarity and fire, visible to the naked eye
  • Better value per carat weight

From everyday fine jewelry to once-in-a-lifetime engagement rings, our lab grown collection is designed with the future in mind.

Custom Design for Your Dream Ring

Looking for something truly personal? We offer full custom engagement ring design services:

  • Choose your ring size, metal (platinum, yellow, white, or rose gold), and carat
  • Add an engraving or build a full stack with matching wedding bands
  • Mix and match stone shapes — or bring your own loose diamonds
  • Visualize your design with our online modal dialog before finalizing

Create your one-of-a-kind ring with our expert team — all from the comfort of home.

Delivery & Shopping Info

  • All rings are made to order and shipped securely
  • We offer worldwide delivery, including USA, Canada, Australia, and more
  • Pay safely with Apple Pay, major cards, and other methods
  • Transparent pricing: no hidden fees, only beauty and quality

Need help?

Frequently Asked Questions

Your Perfect Diamond, Reimagined

Step beyond the expected with a marquise cut lab diamond ring — refined, radiant, and responsibly made. Whether you're creating a custom design or selecting from our curated collection, you'll experience unmatched craftsmanship and conscious beauty.

Ready to shine with something different?

Shop now and find the engagement ring that’s as unique as your story.

Brilliant Carats