Marquise Lab-Grown Diamond Trillion-Side Three-Stone Engagement Ring
- Free insured shipping on every order
- Free 2-day express over $250Express 2‑day shipping is measured from when your piece is completed — not the order date — unless the item is in stock and ready to ship.
- 30-day returns
- Free lifetime warranty
Details
Triangle side stones echo the points of the marquise. Two trillion-cut lab-grown diamonds flank the center, their points angled outward so the triangles repeat the marquise's own tapering ends. Each trillion is held by claws at its corners, and the marquise sits in claws with one at each tip. The shank is plain metal. The result is sharp and geometric, suited to someone who wants a three-stone ring built from clean angles rather than round softness.
Choose a marquise center from 0.70 to 1.60 carats. Each center is a calibrated lab-grown diamond made to an F-G color, VS clarity specification. Carat weights are nominal and each size has a published range; the 1.00 ct size, for example, runs 0.83 to 1.05 ct. Lab-grown diamonds are real diamonds, chemically and physically the same as mined ones. If you would rather pick an individually graded loose diamond, natural or lab-grown, build it in Design Your Ring.
Available in 14K white, yellow or rose gold, or platinum. The accent diamonds are lab-grown, near-colorless stones matched to the setting. Your ring is made to order in your size (US 5 to 9; see the sizing guide) and typically ships in about 5 to 10 business days by complimentary, insured UPS Express. More marquise settings are in our Marquise Engagement Rings collection.
Specifications
Shipping & Returns
Every order ships via complimentary insured UPS Express, signature required on delivery. Ready-to-ship pieces leave us in 2–3 business days; made-to-order pieces in 5–10. Returns accepted within 30 days, and every piece carries our free lifetime warranty.
Answers, before you ask
Your Questions
Why trillions beside a marquise?
Both shapes are built on points. A trillion is a triangle, so setting one on each side of the marquise repeats its angled ends and creates a single, continuous geometric outline across the top of the ring. It looks crisp and modern, and the trillions add width at the center, which gives the long marquise more presence on the finger.
Are the trillion corners protected too?
Yes. Each trillion has a claw at its corners, so its points are covered by metal rather than left bare, and the marquise has a claw at each tip. Every point on the ring is held. As with any claw-set design, a periodic check by a jeweler keeps the claws snug, which is good practice for a ring with this many points.
What quality is the center diamond?
Every marquise center is a calibrated lab-grown diamond made to an F-G color, VS clarity specification. Sizes are sold by nominal carat weight with a published tolerance range, so a stone may weigh slightly over or under the headline figure within that range. If you want a specific graded stone, Design Your Ring lets you choose one individually.
Can I have a natural diamond instead?
This ring is offered with lab-grown centers. For a natural diamond, use Design Your Ring to choose a natural loose diamond with its own grading report and set it in one of our settings, or email concierge@diamondandsapphire.com and we will help.
How long does it take to make?
Each ring is made to order in your finger size. Most ship in about 5 to 10 business days, insured and signature-required. The product page shows the current timing before you check out.
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