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Luna Round 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
Round Brilliant · Solitaire
Center
Round Brilliant
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 | In the Photos | Customizable |
|---|---|---|
| Center Diamond | Round Brilliant · 7.35–7.45 mm · Approx. 1.50 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. 1.50 ct | Varies with selected center size |
| Stone Type | Lab Grown Diamond | — |
| Setting | Six-Prong Cathedral Basket Setting with Knife Edge Shank | — |
| Finish | High Polish | — |
| Occasion | Engagement · Anniversary · Bridal | — |
At a glance
A round lab grown diamond solitaire engagement ring from Signora Jewels.
The ring shown features a round brilliant lab grown diamond measuring approximately 7.35–7.45 mm and weighing approximately 1.50 ct. A refined six-prong cathedral basket and knife edge shank create a timeless solitaire profile that places complete focus on the center diamond.
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 cathedral basket securely embraces the round brilliant diamond while allowing generous light to enter through the open gallery beneath. The additional prongs provide balanced protection without hiding the stone's brilliance, making this setting especially well suited to larger round diamonds.
The knife edge shank introduces crisp definition while maintaining a slim, elegant profile. Its polished surfaces reflect light beautifully and create clean architectural lines that complement the classic solitaire design. Signora Jewels handcrafts every ring to order in your selected precious metal and center diamond size.
Design Highlights
- Customizable round brilliant lab grown diamond from 1 ct to 4.5 ct
- Six-prong cathedral basket setting
- Knife edge comfort shank
- Open gallery construction
- Classic solitaire styling
- High polish finish
Browse our Solitaire Engagement Rings, explore the Engagement Ring Guide, or compare precious metals using our Metal Guide.
Diamond Details
| Specification | Details |
|---|---|
| Center Diamond | Round Brilliant · 7.35–7.45 mm · Approx. 1.50 ct (Shown) |
| Accent Diamonds | None |
| Total Stones | 1 |
| Total Diamond Weight | Approx. 1.50 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 and vary according to the selected center diamond.
About Lab Grown Diamonds
The round brilliant cut is renowned for exceptional brilliance and balanced proportions. Combined with a six-prong cathedral basket and open gallery, this solitaire design allows outstanding light performance while preserving timeless elegance.
Metal, Care & Fit
Available in Silver, 9K, 14K and 18K Yellow, White and Rose Gold, plus Platinum. Clean beneath the cathedral basket using warm water, mild soap and a soft brush to keep the diamond bright and the polished finish looking its best.
FAQ
Why does this ring use six prongs instead of four?
Six prongs provide additional support for the round brilliant diamond while maintaining excellent light exposure.
Can I choose a different center diamond size?
Yes. This design is available with center diamond sizes from 1 ct through 4.5 ct.
What is a knife edge shank?
A knife edge shank features a subtle raised center ridge that creates clean lines and gives the band a refined, contemporary profile.
Is this solitaire suitable for everyday wear?
Yes. The cathedral basket, six-prong setting and comfort-fit shank are designed to provide lasting security and comfort for everyday wear.
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.