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Marquise Lab Grown Diamond Three-Stone Engagement Ring
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The Signora Promise
Hand-finished in SuratMade to order
Reports where statedExact scope shown
Insured deliverySigned & tracked
Secure checkoutShopify checkout
Standard-design returns30-day eligibility
Final inspectionChecked before dispatch
About This Ring
Marquise Cut · Three Stone
Center
Marquise Cut
Carat
1 ct
CustomizableMetal
CustomizableSetting
Three Stone
An independent IGI grading report is included when the selected individual lab-grown center or primary diamond is 0.50 ct or larger.
| Detail | In the Photos | Customizable |
|---|---|---|
| Center Diamond | Marquise Rose Cut · 10.50 × 5.30 mm · Approx. 1.00 ct | 1 ct, 1.5 ct, 2 ct, 2.5 ct, 3 ct, 3.5 ct, 4 ct, 4.5 ct |
| Side Diamonds | 2 Pear Cut Diamonds · Approx. 0.20 ct total | Scaled to suit the selected center size |
| Total Diamond Weight | Approx. 1.20 ct | Varies with selected center size |
| Stone Type | Lab Grown Diamond | — |
| Setting | Six-Prong Basket with Pear Side Diamonds | — |
| Finish · Occasion | High Polish · Engagement, Anniversary, Bridal | — |
At a glance
A marquise lab grown diamond three-stone engagement ring from Signora Jewels.
The ring shown features a 10.50 × 5.30 mm marquise rose cut lab grown diamond weighing approximately 1.00 ct. Two pear cut side diamonds total approximately 0.20 ct, bringing the total diamond weight to approximately 1.20 ct.
Made to order in 11 metals: Silver, 9K, 14K and 18K Yellow, White and Rose Gold, plus Platinum.
Select your preferred center diamond size and precious metal using the options on this page.
The marquise center is held in a six-prong basket that protects both pointed tips while leaving the elongated outline open to view. The basket keeps the diamond elevated just enough for light to enter beneath the stone while maintaining a balanced profile. The rose cut creates broad reflections that emphasize the long silhouette of the marquise.
Two pear cut side diamonds taper naturally toward the band, adding brilliance without competing with the center. Their rounded ends face outward while the pointed tips lead the eye toward the marquise, creating a smooth transition into the plain comfort shank. Signora Jewels makes every ring to order in your selected precious metal and center diamond size.
Design Highlights
- Customizable marquise rose cut lab grown diamond from 1 ct to 4.5 ct
- Six-prong basket setting
- Two pear cut side diamonds totaling approximately 0.20 ct
- Open gallery beneath the center stone
- Plain comfort shank
- High polish finish
Browse more Three-Stone Rings, explore our Engagement Ring Guide, or compare precious metals using our Metal Guide.
Diamond & Ring Details
| Specification | Details |
|---|---|
| Center Diamond | Marquise Rose Cut · 10.50 × 5.30 mm · Approx. 1.00 ct (shown) |
| Side Diamonds | 2 Pear Cut Diamonds · Approx. 0.20 ct total |
| Total Stones | 3 |
| Total Diamond Weight | Approx. 1.20 ct |
| Center Diamond Options | 1 ct, 1.5 ct, 2 ct, 2.5 ct, 3 ct, 3.5 ct, 4 ct and 4.5 ct |
| Finish | High Polish |
Measurements are approximate. Final dimensions vary according to the selected center diamond size.
About Lab Grown Diamonds
The marquise rose cut combines an elongated outline with large, open facets that create broad flashes of light. The pear side diamonds mirror the flowing shape of the center while preserving the balanced proportions of this three-stone design.
Metal, Care & Fit
Available in Silver, 9K, 14K and 18K Yellow, White and Rose Gold, plus Platinum. Clean beneath the basket and around the pear side diamonds with warm water, mild soap and a soft brush to maintain maximum brilliance.
FAQ
Why does this ring use six prongs?
Six prongs support the marquise diamond at both pointed ends and along its sides, helping protect the elongated shape during everyday wear.
Can I choose a different center diamond size?
Yes. This design is available with center diamond sizes from 1 ct through 4.5 ct while maintaining the same three-stone style.
What do the pear side diamonds add?
The pear side diamonds soften the transition into the band while complementing the elongated silhouette of the marquise center.
Is this ring comfortable for daily wear?
Yes. The plain comfort shank and open basket provide a balanced fit while keeping the center stone securely supported.
Common questions
Ring questions, answered
Timing, shipping, certification and return eligibility for made-to-order rings.
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Answers last updated August 2, 2026
When will my order ship?
Standard listed pieces are made to order with an estimated dispatch of 7 business days. Use the product-page estimate when it is more specific and the timing confirmed after ordering. Delivery timing begins after dispatch and varies by destination and carrier service. Fully custom commissions follow the production schedule confirmed with their approved specifications or CAD.
When is insured worldwide delivery free?
Orders of US$500 or more receive free express, insured and tracked worldwide delivery. Below US$500, express, insured and tracked worldwide delivery is charged at the fixed rate shown at checkout.
Will I have to pay import duties?
For every destination available at checkout, Signora prepays applicable import duties and import taxes. Customers should not be asked to pay those import charges again on delivery.
What certificate comes with my jewelry?
Every finished piece includes a Signora Jewelry Certificate. Each selected individual lab-grown center or primary diamond of 0.50 ct or above includes an IGI grading report. Below 0.50 ct, IGI can be arranged by custom request. Custom moissanite and gemstone selections include GRA documentation, with the exact scope confirmed in the approved specifications. The product page or approved specifications state the exact laboratory, report type and scope.
Can I return a made-to-order listed design?
Standard listed products are eligible for return within 30 days after carrier-recorded delivery when unworn, unused and in their original condition, with the original packaging and included documents. Normal listed choices such as metal, stone carat, chain or bracelet length, an extended ring size, or complimentary engraving do not by themselves make an item Final Sale. A sale or discount also does not imply Final Sale; only an item explicitly classified as Final Sale follows the non-returnable exclusion.
How are fully custom orders handled?
A fully custom commission is different from a listed made-to-order design. After its specifications or CAD are approved, a normal change-of-mind return does not apply. Manufacturing defects remain reviewable. Signora may accept an exceptional non-defect return case by case; documented labor and genuinely non-recoverable costs may be deducted, but these deductions are not a restocking fee.