Princess Cut Lab Grown Diamond Three-Stone Engagement Ring

IGI Report IncludedMade to OrderInsured Delivery

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$982.00

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Independently graded by IGI IGI Report Included Selected 0.50 ct+ lab-grown center or primary diamond · IGI grading report · Signora Jewelry Certificate included. 1 ct lab-grown diamond · IGI report · Signora Certificate included.

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Center Diamond:

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Complimentary · hand-engraved to order · adds about 3–4 days.

Estimated dispatch: 7 business days Duties & taxes prepaid

Ring size guide

Lay a ring you own flat on the circle and slide until it sits just inside it — or set its inner diameter directly.

Measure the inside of a ring that already fits — inner edge to edge — with a ruler in mm, then set it below. No ring handy? Try Measure your finger.

14 mm 24 mm 17.3 mm

Inner diameter mm

US size

UK size

EU size

Circumference

54.3 mm

Between sizes? Always choose the larger size. Fingers are slightly bigger in the evening — measure then for the best fit.

Method 1 — Use an existing ring

Find a ring that fits the intended finger comfortably.
Place it flat and measure the inner diameter (inside edge to inside edge) in mm.
Enter that measurement in the Measure a ring tab.

Method 2 — Wrap and measure

Wrap a thin strip of paper around the base of your finger.
Mark where it overlaps — measure that length in mm (your circumference).
Divide by 3.1416 (π) to get your diameter, then use the Measure a ring tab.

Tip: Middle finger sizes typically run half a size larger than the ring finger. If between sizes, go up. Measure in the evening — fingers are slightly larger then.

7US size

US	UK	EU	Diameter	Circumference

Highlighted row = your converted size. Most common women's sizes are US 6–7. All measurements in mm.

Selected: —

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

Customizable

Metal

Customizable

Setting

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.

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