Radiant Diamond Four Prong Ring

IGI Report IncludedMade to OrderInsured Delivery

1 of 14

$645.00

Price updates with your selections

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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Metal:

Center Diamond:

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Ring size Choose one

Forever, A & J

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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

Radiant Cut · Solitaire

Center

Radiant 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.

Each metal color is shown in the photos — pick your center size and metal in the options on this page.

Detail	In the photos	Customizable
Center diamond	Radiant · 1.21 ct	Yes — 1 to 4.5 ct
Metal & color	Every color shown	Yes — 11 options
Total diamond weight	approx. 1.21 ct	Varies with center size
Stone type	Lab Grown Diamond	Lab grown or natural

Made to order — the price updates with your selection. Want fully bespoke?

Customize your jewelry here.

This radiant cut lab grown diamond engagement ring combines crisp geometry with brilliant sparkle. Designed around a beautifully proportioned radiant cut center, the solitaire setting keeps every detail focused on the diamond's fire and brilliance.

Four claw prongs secure the center stone while the open basket allows light to enter from every angle. The slim polished band creates a refined profile that feels comfortable for everyday wear and timeless enough for a lifetime.

Made to order in your preferred center size and metal, this design delivers the bold presence of a rectangular diamond with the lively sparkle that makes radiant cuts so sought after.

Design highlights

Radiant cut lab grown diamond center stone
Classic four-prong solitaire setting
Open gallery for enhanced brilliance
Slim high-polish band
Elegant cathedral-style shoulders
Clean and timeless engagement ring profile
Customizable center size from 1–4.5 ct
Available in 11 metal and color options

The radiant cut offers the perfect balance between shape and sparkle. Its trimmed corners and brilliant faceting create exceptional light return while maintaining a sophisticated rectangular silhouette.

Diamond Details

Specification	Details
Center Stone Shape	Radiant Cut
Center Stone Size	7.00 × 5.00 mm
Center Stone Weight (as shown)	Approx. 1.21 CT
Total Diamond Weight	Approx. 1.21 CT
Total Diamond Count	1
Stone Type	Lab Grown Diamond
Setting	Four-Prong Solitaire

Measurements are approximate; your chosen size sets the final center weight.

Ring Specifications

Feature	Details
Ring Style	Solitaire
Metal Options	Silver, 9K, 14K, 18K Gold, Platinum
Available Colors	Yellow Gold, White Gold, Rose Gold, Silver, Platinum
Setting Type	Four-Prong Solitaire
Finish	High Polish
Occasion	Engagement, Anniversary, Bridal

About Lab Grown Diamonds

A radiant marries an emerald's trimmed-corner outline with brilliant faceting, so it throws lively sparkle while keeping a bold rectangular footprint. The cropped corners are structurally tough and seat securely in prong or halo settings.

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

Can I change the center stone size?
Yes. Center sizes from 1 CT to 4.5 CT are available, and the setting is scaled to suit the stone you choose.

Are lab grown diamonds real diamonds?
Yes. Lab grown diamonds are chemically, physically, and optically identical to mined diamonds and are graded using the same standards.

Why choose a radiant cut diamond?
Radiant cuts combine the brilliance of a round diamond with the elegant shape of a rectangular stone, creating exceptional sparkle and presence.

What metals are available?
Silver, 9K, 14K, and 18K gold in yellow, white, and rose, plus Platinum.

Is this ring made to order?
Yes. Every Signora Jewels ring is crafted specifically to your selected center size and metal combination.

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