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Cushion Lab Grown Diamond Solitaire 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
Cushion Cut · Solitaire
Center
Cushion 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 | Cushion Old Mine Cut · 9.35 × 7.80 mm · approx. 3.00 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. 3.00 ct | Varies with center size |
| Stone type | Lab Grown Diamond | — |
| Setting | Four Double-Claw Prong Cathedral Open Basket Solitaire | — |
| Finish · Occasion | High Polish · Engagement, Anniversary, Bridal | — |
At a glance
A cushion Old Mine cut lab grown diamond solitaire engagement ring from Signora Jewels.
An approximately 3.00 ct cushion Old Mine cut diamond measuring 9.35 × 7.80 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 broad facets of the Old Mine cushion create bold flashes of light while the softly rounded outline gives the stone its distinctive antique-inspired character. At Signora Jewels, four double-claw prongs secure each corner without overwhelming the center, while the cathedral basket lifts the diamond above the shank so light can enter freely through the open gallery.
The approximately 2.10 mm comfort-fit shank provides balanced support beneath the larger center stone without distracting from its proportions. With an approximate setting height of 8.00 mm, the elevated basket creates an elegant side profile while keeping the solitaire refined and 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
- Cushion Old Mine cut center shown at approximately 3.00 ct
- Customizable center diamond from 1 ct to 4.5 ct
- Four double-claw cathedral basket
- Open gallery beneath the center stone
- Comfort-fit shank approximately 2.10 mm wide
- Made to order in 11 precious metal options
The double-claw prongs emphasize the softly squared outline of the Old Mine cushion while keeping the corners protected. The open cathedral basket creates an airy profile that complements the larger center stone without adding unnecessary visual weight.
Diamond & Ring Details
| Specification | Details |
|---|---|
| Center stone | Cushion Old Mine Cut · 9.35 × 7.80 mm · approx. 3.00 ct (shown) |
| Accent stones | None |
| Total weight / count | Approx. 3.00 ct · 1 Diamond |
| Setting | Four Double-Claw Prong Cathedral Open Basket Solitaire |
| 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 Old Mine cushion is admired for its broad antique-style facets and soft pillow-shaped outline that produce larger flashes of light than modern brilliant cuts. Every center diamond is F color, VS1 clarity and , selected to complement the proportions of this cathedral solitaire.
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 and maintain the brilliance of the center diamond.
FAQ
Why does this ring use double-claw prongs?
Each corner is secured by two fine claw tips instead of one, providing additional protection while preserving the elegant outline of the Old Mine cushion.
What is the benefit of the cathedral basket?
The cathedral shoulders support the basket from below while raising the center diamond into stronger light. The open gallery also makes routine cleaning easier.
Can this ring be paired 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 suits an Old Mine cushion?
Yellow and rose gold highlight the antique-inspired character of the cushion, while white gold and platinum emphasize the crisp outline of the double-claw cathedral setting.
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.