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Round 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
Round Brilliant · Three Stone
Center
Round Brilliant
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 | Round Brilliant · 6.40–6.50 mm · Approx. 1.00 ct | 1 ct, 1.5 ct, 2 ct, 2.5 ct, 3 ct, 3.5 ct, 4 ct, 4.5 ct |
| Side Diamonds | 2 Round Brilliant · 4.80 mm each · Approx. 0.80 ct total | Scaled to suit the selected center size |
| Total Diamond Weight | Approx. 1.80 ct | Varies with selected center size |
| Stone Type | Lab Grown Diamond | — |
| Setting | Trellis Basket with Six-Prong Center & Four-Prong Side Stones | — |
| Finish · Occasion | High Polish · Engagement, Anniversary, Bridal | — |
At a glance
A round lab grown diamond three-stone engagement ring from Signora Jewels.
The ring shown features a 6.40–6.50 mm round brilliant lab grown diamond weighing approximately 1.00 ct. Two round brilliant side diamonds totaling approximately 0.80 ct complete the three-stone design.
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 six-prong basket holds the round brilliant center securely while leaving the pavilion open to light. A trellis gallery crosses beneath the three diamonds, creating an airy profile that supports the setting without adding unnecessary bulk. The center remains the focal point while the side diamonds provide balanced brilliance.
Two 4.80 mm round brilliant diamonds sit in matching four-prong settings, giving the ring a classic three-stone silhouette with generous finger coverage. The plain comfort shank keeps the design clean and allows the diamonds to stand out. Signora Jewels makes 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 trellis basket center setting
- Two round brilliant side diamonds totaling approximately 0.80 ct
- Open trellis gallery construction
- Plain comfort shank
- High polish finish
Browse more Three-Stone Rings, explore our Engagement Ring Guide, or compare precious metals using our Metal Guide.
Diamond & Ring Details
| Specification | Details |
|---|---|
| Center Diamond | Round Brilliant · 6.40–6.50 mm · Approx. 1.00 ct (shown) |
| Side Diamonds | 2 Round Brilliant · 4.80 mm each · Approx. 0.80 ct total |
| Total Stones | 3 |
| Total Diamond Weight | Approx. 1.80 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. Final dimensions vary according to the selected center diamond size.
About Lab Grown Diamonds
The round brilliant cut delivers balanced sparkle from every angle, making it a classic choice for a three-stone engagement ring. Matching round side diamonds preserve the symmetry of the design while the open trellis basket allows light to reach each stone.
Metal, Care & Fit
Available in Silver, 9K, 14K and 18K Yellow, White and Rose Gold, plus Platinum. Clean beneath the trellis gallery and around all six center prongs with warm water, mild soap and a soft brush to maintain maximum brilliance.
FAQ
Why does this design use a trellis basket?
The trellis gallery supports all three diamonds while leaving the setting open beneath them, allowing more light to reach each stone and making cleaning easier.
Can I choose a larger center diamond?
Yes. This design is available with center diamond options from 1 ct through 4.5 ct while maintaining the same three-stone proportions.
Do the side diamonds match the center?
Yes. The two round brilliant side diamonds complement the round center, creating a balanced three-stone profile with approximately 0.80 ct of additional diamond weight.
Is the plain comfort shank suitable for everyday wear?
Yes. The smooth comfort shank provides a balanced fit while keeping the attention on the three round brilliant 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.