Marquise Lab-Grown Diamond Engagement Ring | Canted Corner Tabs on a Wide Band
Marquise Lab-Grown Diamond Engagement Ring | Canted Corner Tabs on a Wide Band
Nyx Jewel Size Guide
| US | UK/AU | DIA (mm) | CIRC (mm) |
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How to Measure
Wrap a piece of paper or string around your finger. Mark where it overlaps, then measure that length with a ruler in millimeters. Slide to match your measurement above.
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Product Description
Product Description
Specifications
- Center stone: Marquise cut lab-grown diamond — chosen in the Ring Builder
- Accent stones: None — center stone only
- Stone orientation: Canted (set on the diagonal across a wide band)
- Setting: two flat gold tabs gripping the stone at opposite corners, laid on the diagonal across a wide flat band
- Metal: 10K, 14K & 18K solid gold and platinum
- Certification: IGI certificate on the center stone
- Ring sizes: US 3–10, including half sizes
- Made to order: 7-day production, then shipping
💎 Price shown after selecting your center stone.
Use our Ring Builder to choose your preferred diamond — carat, cut, and quality. Your final price is calculated once your center stone is selected.
A marquise is the longest of the fancy cuts, and setting it on the diagonal is the only way to use that length without it hanging off both sides of the finger. Angled, the two points run corner to corner across the band and the stone occupies the whole width - it looks bigger than the same weight set straight, because nothing is wasted over the edge.
The setting
Two flat tabs do all the holding, one at each point, folded over the tip where a marquise needs metal most. There is no gallery and no under-bezel: the stone lies directly on the top face of the band, which is why it sits so low. The band itself is wide, flat-topped and softly rounded at the edges, and the polished gold either side of the diamond acts as a mirror - on a marquise, with its long flat flanks, that reflection doubles the apparent length of the stone.
About our lab-grown diamonds
Every stone we set is a lab-grown diamond — the same carbon crystal structure, hardness and optical behavior as a mined diamond, grown rather than extracted. Center stones of 1 carat and above ship with an IGI certificate stating carat, cut, color and clarity. Melee and pave stones are matched to the same color and clarity range but are not individually certified.
About the photographs
The photographs on this page show this setting made with one specific stone. The setting is exactly what you will receive; a different center stone changes the proportions — a heavier one spans more of the finger and sits a little higher. We photograph every finished ring and send you those images before it ships.
Common questions
Are two tabs enough to hold a marquise safely?
They are placed where it counts. The points are the weak part of a marquise and both are capped in metal; the body of the stone is supported along its full length by the flat of the band, so there is nowhere for it to flex. This is a more secure arrangement than a four-claw setting that leaves the tips exposed.
How does it sit under a glove or a sleeve?
Very flat. Because the stone rests on the band rather than above a gallery, total height off the finger is a few millimeters, and the canted angle means there is no leading corner to catch. It is one of the easier diamond rings to wear all day.
Do the photographs show the exact ring I will receive?
The setting, yes — those are photographs of this setting made in our workshop. The diamond in them is one specific stone, so a different center stone will not look identical: a heavier one covers more of the finger and sits slightly higher. We photograph every finished ring and send you those images before it ships.
Is the center stone certified?
Yes. Every center stone of 1 carat and above ships with an IGI certificate stating carat, cut, color and clarity. Accent and pave stones are matched to the same color and clarity range but are not individually certified.
Materials & Care
Materials & Care
Material
Our pieces are thoughtfully crafted in
100% certified recycled gold, paired with ethically sourced lab-grown diamonds and moissanite. Designed with precision, each creation reflects timeless beauty and modern craftsmanship.
Care
To preserve its brilliance, remove your jewelry before exposure to chemicals, water, or heavy activities. Store it safely and clean occasionally with a soft cloth for a lasting shine.
Shipping & Returns
Shipping & Returns
Shipping
Enjoy complimentary shipping on every order. Each piece is thoughtfully packaged to protect its beauty in transit. Standard delivery takes 5–9 business days, with faster shipping options available.
Returns & Exchanges
We want you to love your piece. If not, returns and exchanges are accepted within 30 days of delivery. Simply ensure items are unworn and in original packaging to begin the process.
Virtual Appointment
Arrange a private virtual consultation and experience our lab-grown diamond and moissanite collections wherever you are.
Daily: 7am–3pm ET Book a CallShare
Everything inside the box.
Your Ring
Handcrafted to order
IGI Certificate
Diamond grading report
Luxury Box
Proposal-ready
Hidden Birthstone
Set inside the band
Warranty Card
Lifetime coverage
Polishing Cloth
Keep her sparkling
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Doubts? Good.
The right ring deserves them.
Yes. 100%. They're chemically, optically, and physically identical to mined diamonds — same hardness, same fire, same sparkle. Even a jeweler can't tell them apart without specialized equipment. The only difference is origin: ours grew in a few weeks instead of a few billion years.
Ready-to-ship pieces arrive in 3–5 business days with free insured shipping. Custom rings and bridal sets take 2–3 weeks — because each is handcrafted to order. We'll keep you posted at every stage, including a final photo before it ships.
No-questions-asked 30-day returns on every non-customized piece. If it's not perfect, send it back — full refund, no awkward calls. For custom and engraved pieces, we offer store credit so you can choose again.
Complimentary resizing within the first month— including a return-shipping label. Our lifetime warranty also covers ongoing maintenance, polishing, and minor repairs at no cost. The ring is yours forever; so is our service.