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Marquise Lab Grown Diamond Geometric Engagement Ring
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The Signora Promise
Hand-finished in SuratMade to order
IGI Report IncludedExact scope shown
Insured deliverySigned & tracked
Secure checkoutShopify checkout
Standard-design returns30-day eligibility
Final inspectionChecked before dispatch
About This Ring
Marquise Cut · Solitaire
Center
Marquise Cut
Carat
1 ct
CustomizableMetal
CustomizableSetting
Solitaire
An independent IGI grading report is included when the selected individual lab-grown center diamond is 1.00 ct or larger. Its report number is laser-inscribed on that report-bearing center diamond. Accent and side diamonds are matched and inspected to Signora Standards and are not individually laboratory graded.
| Detail | In the photos | Customizable |
|---|---|---|
| Center diamond | Marquise Brilliant · 10.20 × 5.37 × 3.28 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 |
| Accent diamonds | None | — |
| Total diamond weight | Approx. 1.00 ct | Varies with center size |
| Stone type | Lab Grown Diamond | — |
| Setting | Six-Prong Open Cathedral Basket with Geometric Split Shank | — |
| Finish · Occasion | High Polish · Engagement, Anniversary, Bridal | — |
At a glance
A marquise lab grown diamond geometric engagement ring from Signora Jewels.
An approximately 1.00 ct marquise brilliant measuring 10.20 × 5.37 × 3.28 mm is secured in a six-prong cathedral basket within a geometric kite-shaped split shank.
Made to order in 11 metals: Silver, 9K/14K/18K Gold (Yellow, White and Rose) and Platinum.
Each metal color is shown in the photos. Choose your preferred center diamond weight and metal from the options on this page.
The elongated marquise brilliant is framed by an open kite-shaped split shank that creates clean geometric lines around the center without enclosing it. At Signora Jewels, six prongs secure the pointed tips and curved sides while the cathedral basket lifts the diamond above the band, allowing the full outline to remain visible.
The approximately 1.90 mm comfort-fit shank widens into the geometric frame before narrowing beneath the basket, giving the ring a balanced architectural profile. With an approximate setting height of 6.10 mm, the open gallery allows light beneath the diamond while keeping the design comfortable for everyday wear.
Browse our engagement rings, compare diamond shapes in the diamond stone guide, or explore precious metal options in our metal guide.
Design highlights
- Marquise brilliant center shown at approximately 1.00 ct
- Customizable center diamond from 1 ct to 4.5 ct
- Six-prong cathedral basket
- Geometric kite-shaped split shank
- Open gallery beneath the center diamond
- Comfort-fit band approximately 1.90 mm wide
The open kite frame creates strong geometric symmetry while leaving the marquise completely visible from every direction. Instead of using accent diamonds, the polished metal lines become the defining feature of the design.
Diamond & Ring Details
| Specification | Details |
|---|---|
| Center stone | Marquise Brilliant · 10.20 × 5.37 × 3.28 mm · approx. 1.00 ct (shown) |
| Accent stones | None |
| Total weight / count | Approx. 1.00 ct · 1 Diamond |
| Setting | Six-Prong Open Cathedral Basket with Geometric Split Shank |
| Center 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. Your selected center diamond weight determines the final proportions of the finished ring.
About Lab Grown Diamonds
The marquise brilliant combines pointed ends with brilliant-cut facets to create lively sparkle and impressive finger coverage. Every center diamond is F color, VS1 clarity and , selected to complement the proportions of this geometric cathedral design.
Metal, Care & Fit
Available in Silver, 9K, 14K and 18K Yellow, White and Rose Gold, plus Platinum. Clean beneath the open cathedral basket using warm water, mild soap and a soft brush to remove everyday buildup. Inspect the six prongs regularly to ensure both pointed ends remain securely protected.
FAQ
What makes the kite-shaped frame different from a traditional split shank?
The split shoulders meet above and below the center stone to create a complete geometric outline. This gives the ring a bold architectural appearance while keeping the center fully visible.
Why does this marquise use six prongs?
The additional prongs secure both pointed tips and support the curved sides of the diamond. This provides extra protection while maintaining an open view of the stone.
Can this ring be worn with a wedding band?
Yes. The cathedral basket allows many straight wedding bands to sit close, while contoured bands can follow the raised profile more precisely.
Which metal color best complements this design?
White gold and platinum emphasize the crisp geometric lines, while yellow and rose gold create warm contrast around the elongated marquise center.
Common questions
Ring questions, answered
Timing, shipping, certification and return eligibility for made-to-order rings.
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Answers last updated July 31, 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 express shipping free?
The configured free-shipping reference is orders over $500 USD. Eligibility, any currency equivalent, the available service and the final shipping charge are determined by the cart and Shopify checkout for your destination and order total before payment.
Will I have to pay import duties?
Duties and applicable import taxes are prepaid by Signora for deliveries to the US, UK and Canada. You should not be asked to pay them again on delivery.
What certificate comes with my jewelry?
Every finished Signora jewelry product includes a Signora Jewelry Certificate. Any independent stone report included with the selected configuration is shown in the product details and order record.
Can I return a made-to-order listed design?
Standard listed products are eligible for return within 30 days of 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 are still handled, and Signora will review any exceptional circumstances with the customer.