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Princess Cut Lab Grown Diamond Three-Stone 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
Princess Cut · Three Stone
Center
Princess Cut
Carat
1 ct
CustomizableMetal
CustomizableSetting
Three Stone
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 | Princess Cut · 5.70 × 5.70 mm · Approx. 1.06 ct | 1 ct, 1.06 ct, 1.5 ct, 2 ct, 2.5 ct, 3 ct, 3.5 ct, 4 ct, 4.5 ct |
| Side Diamonds | 2 Princess Cut · 4.60 × 4.60 mm each · Approx. 0.56 ct total | Scaled to suit the selected center size |
| Total Diamond Weight | Approx. 1.62 ct | Varies with selected center size |
| Stone Type | Lab Grown Diamond | — |
| Setting | Four-Prong Trellis Basket Setting | — |
| Finish · Occasion | High Polish · Engagement, Anniversary, Bridal | — |
At a glance
A princess cut lab grown diamond three-stone engagement ring from Signora Jewels.
The ring shown features a 5.70 × 5.70 mm princess cut lab grown diamond weighing approximately 1.06 ct. Two princess cut side diamonds totaling approximately 0.56 ct complete the three-stone design. Approximate total diamond weight is 1.62 ct.
Made to order in 11 metals: 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 center princess cut is secured by a four-prong trellis basket that keeps each corner protected while leaving the sides open to light. The trellis structure crosses beneath the diamonds instead of using a solid gallery, giving the setting a lighter profile and making the center easier to clean from underneath.
Two matching princess cut side diamonds continue the clean geometry of the center stone, creating a balanced three-stone arrangement with uninterrupted square outlines. The plain comfort shank keeps the focus on the diamonds while providing a smooth fit for everyday wear. Signora Jewels crafts every ring to order in your selected metal and center diamond size.
Design Highlights
- Customizable princess cut lab grown diamond from 1 ct to 4.5 ct
- Four-prong trellis basket setting
- Two princess cut side diamonds totaling approximately 0.56 ct
- Open trellis gallery construction
- Plain comfort shank
- High polish finish
Browse more Three-Stone Rings, learn about choosing the ideal center stone in our Engagement Ring Guide, or compare precious metals using our Metal Guide.
Diamond & Ring Details
| Specification | Details |
|---|---|
| Center Diamond | Princess Cut · 5.70 × 5.70 mm · Approx. 1.06 ct (shown) |
| Side Diamonds | 2 Princess Cut · 4.60 × 4.60 mm each · Approx. 0.56 ct total |
| Total Stones | 3 |
| Total Diamond Weight | Approx. 1.62 ct |
| Center Diamond Options | 1 ct, 1.06 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. Final dimensions vary according to the selected center diamond size.
About Lab Grown Diamonds
The princess cut is known for its crisp square outline and brilliant faceting. Matching princess cut side diamonds maintain the same geometry across the ring, while the trellis basket keeps the setting open for light and easy maintenance.
Metal, Care & Fit
Available in Silver, 9K, 14K and 18K Yellow, White and Rose Gold, plus Platinum. Clean beneath the trellis basket and around each corner prong with warm water, mild soap and a soft brush to keep every facet bright.
FAQ
Why is a trellis basket used on this design?
The crossed trellis supports the three diamonds while leaving the gallery open, allowing light to reach the stones and making routine cleaning easier.
Can I choose a larger center diamond?
Yes. This design is available with center diamond sizes from 1 ct through 4.5 ct while maintaining the same three-stone layout.
Do the side diamonds match the center?
Yes. Both side stones are princess cut, creating a consistent square profile across the entire ring.
Is the plain comfort shank suitable for everyday wear?
Yes. The polished comfort shank provides a smooth fit while keeping attention on the three princess cut diamonds.
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.