Princess Cut Diamond Cathedral Solitaire Ring

IGI Report IncludedMade to OrderInsured Delivery

1 of 14

$707.00

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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. 1.04 ct lab-grown diamond · IGI report · Signora Certificate included.

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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

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	Details
Ring style	Solitaire
Center diamond	Princess · 5.50 × 5.50 mm · approx. 1.04 ct
Total diamond weight	approx. 1.04 ct (1 stone)
Stone type	Lab Grown Diamond
Setting	Four-Prong Cathedral Setting
Finish	High Polish
Occasion	Engagement

Made to order — select your options above. Want something fully custom?

Customize your jewelry here.

Clean lines, crisp sparkle, and a beautifully balanced profile define this princess cut lab grown diamond engagement ring. The square silhouette creates a bold, contemporary look while keeping the timeless appeal of a solitaire.

Raised in an elegant cathedral setting, the center diamond appears to float above the band, allowing light to enter from multiple angles. The result is exceptional brilliance paired with a refined, architectural presence on the hand.

Crafted exactly as shown, this design is ideal for those who appreciate modern simplicity and the distinctive character of a princess cut diamond.

Design highlights

Princess cut lab grown diamond center stone
Approx. 1.04 ct center diamond
Classic four-prong solitaire setting
Elegant cathedral shoulders
Open gallery for enhanced brilliance
Sleek high-polish finish
Modern square silhouette
Crafted exactly as shown with your chosen metal

This ring pairs the sharp geometry of a princess cut diamond with a graceful cathedral profile, creating a design that feels both contemporary and timeless.

About Lab Grown Diamonds

A princess is a square brilliant with crisp corners and sharp, high-contrast sparkle. It offers a contemporary edge and strong value per carat, and looks especially clean in channel or pavé bands that frame its straight lines.

Every Signora Jewels diamond is grown in a controlled lab using the CVD process, producing a stone that is chemically, optically, and physically identical to a mined diamond — same hardness, same fire, graded on the same 4C scale. Because the supply chain is short and traceable, you get a larger, cleaner stone for the same budget and a documented origin, with no mining footprint. The result is a diamond that looks and tests exactly as a natural one, with more carat and clarity for your money.

FAQ

What makes a princess cut unique?
The princess cut combines a square shape with brilliant faceting, delivering bright sparkle and a clean, modern appearance.

Is the center diamond included?
Yes. The listed ring includes the princess cut lab grown diamond shown in the specifications.

Can this ring be customized?
Choose your options on this page; for anything beyond that we make custom pieces — Customize your jewelry here.

Are lab grown diamonds real diamonds?
Yes. They are identical to mined diamonds in chemistry, hardness, and sparkle, and are graded on the same 4C scale.

Will a lab grown diamond last a lifetime?
Yes. Lab grown diamonds rank 10 on the Mohs hardness scale and are suitable for everyday wear.

What metals can I choose?
Silver, 10K, 14K, and 18K Gold in yellow, white, or rose, plus Platinum.

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