Princess Lab Grown Diamond Solitaire Engagement Ring

IGI Report IncludedMade to OrderInsured Delivery

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$844.00

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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 · Solitaire

Center

Princess Cut

Carat

1 ct

Customizable

Metal

Customizable

Setting

Solitaire

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 · 7.20 × 7.20 mm · Approx. 2.01 ct	1 ct, 1.5 ct, 2 ct, 2.5 ct, 3 ct, 3.5 ct, 4 ct, 4.5 ct
Side Diamonds	2 Marquise Cut Lab Grown Diamonds · Approx. 0.08 ct Total	Scaled proportionally
Total Diamond Weight	Approx. 2.09 ct	Varies with selected center size
Stone Type	Lab Grown Diamond	—
Setting	Four-Prong Cathedral Basket with Twisted Infinity Shank	—
Finish · Occasion	High Polish · Engagement, Anniversary, Bridal	—

At a glance

A princess cut lab grown diamond solitaire engagement ring from Signora Jewels.

The ring shown features a 7.20 × 7.20 mm princess cut lab grown diamond weighing approximately 2.01 ct. Two marquise cut lab grown diamonds totaling approximately 0.08 ct accent the twisted infinity shank for an approximate total diamond weight of 2.09 ct.

Made to order in 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 princess cut center is secured in a four-prong cathedral basket that protects each corner while lifting the diamond above the shank for exceptional light performance. The open gallery beneath allows additional light to enter the stone, highlighting the crisp geometry and brilliant sparkle of the square cut.

The polished infinity shank twists gracefully toward the center and is finished with marquise cut accent diamonds that add subtle brilliance without distracting from the solitaire design. The flowing lines of the band create a modern silhouette while maintaining a comfortable everyday fit. Signora Jewels crafts every ring to order in your selected precious metal and center diamond size.

Design Highlights

Customizable princess cut lab grown diamond from 1 ct to 4.5 ct
Four-prong cathedral basket setting
Twisted infinity shank design
Two marquise cut side accent diamonds
Open gallery construction
High polish finish

Browse more Solitaire Engagement Rings, explore our Engagement Ring Guide, or compare precious metals using our Metal Guide.

Diamond & Ring Details

Specification	Details
Center Diamond	Princess Cut · 7.20 × 7.20 mm · Approx. 2.01 ct (shown)
Side Diamonds	2 Marquise Cut Lab Grown Diamonds · Approx. 0.08 ct Total
Total Stones	3
Total Diamond Weight	Approx. 2.09 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 princess cut combines crisp square proportions with exceptional brilliance. The flowing infinity shank softens the geometric center stone, while the marquise accents add refined detail that complements the modern cathedral setting.

Metal, Care & Fit

Available in Silver, 9K, 14K and 18K Yellow, White and Rose Gold, plus Platinum. Clean beneath the cathedral basket and around the marquise side accents using warm water, mild soap and a soft brush to maintain brilliance.

FAQ

Why is a cathedral basket used for a princess cut?
The cathedral shoulders support the setting while helping protect the pointed corners of the princess cut diamond.

Can I choose a different center diamond size?
Yes. This design is available with center diamond options from 1 ct through 4.5 ct while maintaining the same elegant proportions.

What do the marquise side diamonds add?
They introduce subtle sparkle and graceful detail that complements the flowing infinity shank without overpowering the center diamond.

Is this ring suitable for everyday wear?
Yes. The secure four-prong cathedral setting and comfort shank are designed for lasting daily wear while showcasing the center diamond beautifully.

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