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Lozenge Lab Grown Diamond Solitaire Engagement Ring
1 of 9
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
Cut · Solitaire
Center
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 | Lozenge Step Cut · 12.26 × 8.11 × 4.50 mm · approx. 2.00 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. 2.00 ct | Varies with center size |
| Stone type | Lab Grown Diamond | — |
| Setting | Four Double-Claw Prong Open Cathedral Basket with Wide Knife-Edge Shank | — |
| Finish · Occasion | High Polish · Engagement, Anniversary, Bridal | — |
At a glance
A lozenge step cut lab grown diamond solitaire engagement ring from Signora Jewels.
An approximately 2.00 ct lozenge step cut diamond measuring 12.26 × 8.11 × 4.50 mm is secured in a four double-claw cathedral basket with an open gallery.
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 lozenge step cut creates a bold geometric profile that immediately stands apart from traditional diamond shapes. At Signora Jewels, four double-claw prongs secure each point while the cathedral basket raises the diamond above a wide knife-edge shank. The open gallery leaves the pavilion exposed so light can travel through the long step facets from below.
The approximately 2.50 mm comfort-fit shank gives the ring a substantial feel while balancing the elongated center stone. The knife-edge profile catches light along the ridge without adding unnecessary width, and the approximately 6.90 mm setting height creates an open side profile that remains comfortable for everyday wear.
Browse our engagement rings, compare unique diamond shapes in the diamond stone guide, or explore precious metal options in our metal guide.
Design highlights
- Lozenge step cut center shown at approximately 2.00 ct
- Customizable center diamond from 1 ct to 4.5 ct
- Four double-claw prong cathedral basket
- Wide knife-edge comfort-fit shank
- Open basket gallery for maximum light
- Made to order in 11 precious metal options
The knife-edge band narrows visually toward the center, allowing the elongated lozenge diamond to dominate the design. From the side, the cathedral basket and open gallery create an airy profile that keeps the bold center stone from feeling heavy.
Diamond & Ring Details
| Specification | Details |
|---|---|
| Center stone | Lozenge Step Cut · 12.26 × 8.11 × 4.50 mm · approx. 2.00 ct (shown) |
| Accent stones | None |
| Total weight / count | Approx. 2.00 ct · 1 Diamond |
| Setting | Four Double-Claw Prong Open Cathedral Basket with Wide Knife-Edge 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 lozenge step cut combines a distinctive elongated outline with broad parallel facets that create clean mirror-like reflections instead of scattered sparkle. Every center diamond is F color, VS1 clarity and , selected to suit the proportions of this architectural solitaire.
Metal, Care & Fit
Available in Silver, 9K, 14K and 18K Yellow, White and Rose Gold, plus Platinum. Clean beneath the open basket with warm water, mild soap and a soft brush to keep the pavilion free from everyday buildup. Inspect the double-claw prongs regularly to ensure each point remains securely protected.
FAQ
What makes a lozenge step cut different from other diamond shapes?
The lozenge step cut has a long geometric outline with pointed ends and broad step facets. It creates bold mirror-like reflections while offering a distinctive architectural appearance.
Why does this ring use a knife-edge shank?
The knife-edge profile creates a crisp ridge along the top of the band that reflects light without increasing visual bulk. It also balances the long proportions of the center diamond.
What do the double-claw prongs add?
Each point is secured by two fine claw tips instead of one. This provides additional protection while keeping the outline of the lozenge diamond sharply defined.
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 even more precisely.
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.