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Luna Marquise Lab Grown Diamond Solitaire 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 · Solitaire
Center
Marquise Cut
Carat
1 ct
CustomizableMetal
CustomizableSetting
Solitaire
An independent IGI grading report is included when the selected individual lab-grown center or primary diamond is 0.50 ct or larger.
| Detail | Reference Design | Customizable |
|---|---|---|
| Center Diamond | Marquise Cut Lab Grown Diamond · 10.50 × 5.30 mm · Approx. 1.00 ct (Reference) | 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 (Reference) | Varies with selected center diamond |
| Stone Type | Lab Grown Diamond | — |
| Setting | Six-Prong Cathedral Basket with Knife Edge Shank | — |
| Finish | High Polish | — |
At a glance
A marquise lab grown diamond solitaire engagement ring from Signora Jewels.
The reference design showcases an approximately 1.00 ct marquise cut lab grown diamond secured in a refined six-prong cathedral basket. A slim knife edge shank and open gallery keep the attention on the elongated center stone while creating an elegant everyday silhouette.
Made to order in 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 six-prong basket protects each pointed tip while supporting the marquise diamond with balanced symmetry. The elevated cathedral profile allows light to enter beneath the stone, enhancing brilliance and emphasizing the graceful proportions of the elongated cut.
A polished knife edge shank narrows toward the center to create a refined transition into the basket. Free from additional accent stones, every line of the design is focused on highlighting the marquise diamond with timeless simplicity. Every ring is individually handcrafted by Signora Jewels.
Design Highlights
- Customizable marquise lab grown diamond from 1 ct to 4.5 ct
- Six-prong cathedral basket
- Knife edge comfort shank
- Open gallery construction
- Minimalist solitaire profile
- High polish finish
Browse our Marquise Engagement Rings, explore the Engagement Ring Guide, or compare precious metals using our Metal Guide.
Diamond Details
| Specification | Details |
|---|---|
| Reference Center Diamond | Marquise Cut Lab Grown Diamond · 10.50 × 5.30 mm · Approx. 1.00 ct |
| Accent Diamonds | None |
| Total Stones | 1 |
| Reference Total Diamond Weight | Approx. 1.00 ct |
| Available Center Sizes | 1 ct, 1.5 ct, 2 ct, 2.5 ct, 3 ct, 3.5 ct, 4 ct and 4.5 ct |
| Finish | High Polish |
The measurements shown represent the photographed reference model. Final proportions vary according to the selected center diamond.
About Lab Grown Diamonds
The marquise cut offers exceptional finger coverage with elegant pointed ends and brilliant faceting. Combined with the cathedral basket and knife edge band, this solitaire delivers a clean, refined appearance that remains timeless.
Metal, Care & Fit
Clean beneath the cathedral basket using warm water, mild soap and a soft brush to maintain brilliance. The polished knife edge profile is comfortable for everyday wear and pairs beautifully with a wide variety of wedding bands.
FAQ
Why does this ring use six prongs?
Six prongs provide added protection for the pointed ends of the marquise diamond while maintaining excellent light performance.
Can I customize the center diamond size?
Yes. This design is available with center diamond sizes from 1 ct to 4.5 ct.
What is a knife edge shank?
A knife edge shank features a raised center ridge that gives the ring a refined profile while keeping the band visually slim.
Will a wedding band sit beside this ring?
The cathedral profile pairs well with many straight or gently contoured wedding bands, depending on your preferred fit.
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.