Radiant Cut Three-Stone Engagement Ring

IGI Report IncludedMade to OrderInsured Delivery

Radiant cut lab grown diamond three-stone engagement ring with round side diamonds and channel-set shoulders in yellow gold

1 of 13

$603.00

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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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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.

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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

Radiant Cut · Three Stone

Center

Radiant Cut

Carat

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	Radiant · 9.50 × 8.00 mm · approx. 3.66 ct	1, 1.5, 2, 2.5, 3, 3.5, 3.66, 4, 4.5
Side diamonds	2 Round · 2.80 × 2.80 mm · approx. 0.16 ct total	Scaled with center
Band diamonds	26 Round diamonds · approx. 0.128 ct total	—
Total diamond weight	approx. 3.95 ct · 29 stones	Varies with center size
Stone type	Lab Grown Diamond	—
Setting	Four-Prong Three-Stone with Channel-Set Shoulders	—
Finish · Occasion	High Polish · Engagement, Anniversary, Bridal	—

Diamond details

Shape	Size	Qty	Weight (Approx.)
Radiant	9.50 × 8.00 mm	1	3.66 ct
Round	2.80 × 2.80 mm	2	0.16 ct total
Round	1.10 × 1.10 mm	22	0.11 ct total
Round	1.20 × 1.20 mm	2	0.013 ct total
Round	0.90 × 0.90 mm	2	0.005 ct total
Total	—	29	3.95 ct

At a glance

A radiant lab grown diamond three-stone engagement ring from Signora Jewels.

A 9.50 × 8.00 mm radiant center of approximately 3.66 ct is paired with two round side diamonds totaling approximately 0.16 ct. Twenty-six round accent diamonds complete the channel-set shoulders for an overall weight of approximately 3.95 ct.

Available in Silver, 9K, 14K and 18K Yellow, White and Rose Gold, plus Platinum.

Designed and handcrafted by Signora Jewels with a classic three-stone profile and high-polish finish.

Signora Jewels positions the radiant center in a four-prong basket with open sides that allow light to enter beneath the stone. The two round side diamonds soften the transition from the rectangular center to the slim band while maintaining a balanced appearance across the finger.

The shoulders feature recessed channel-set round diamonds that add sparkle without interrupting the clean lines of the shank. Small accent diamonds beside the side stones complete the transition into the center setting while keeping the overall profile refined.

Design Highlights

Radiant center shown at approximately 3.66 ct
Customizable center from 1–4.5 ct
Two round side diamonds totaling approximately 0.16 ct
Twenty-six round shoulder diamonds totaling approximately 0.128 ct
Four-prong three-stone setting
Approximate total diamond weight 3.95 ct

The combination of a radiant center, round side diamonds and channel-set shoulders gives this ring a structured profile with continuous sparkle. Explore our Three Stone Rings, compare diamond shapes in the Diamond Stone Guide, or browse our Metal Guide to select your preferred finish.

About Lab Grown Diamonds

The radiant cut combines brilliant-style faceting with trimmed corners for exceptional light return. The round side diamonds complement the center without competing for attention, while the channel-set accents add subtle brilliance along the shoulders.

Metal, Care & Fit

White gold and platinum emphasize the clean geometry of the radiant cut, while yellow and rose gold provide warm contrast around the setting. Clean periodically with warm water, mild soap and a soft brush beneath the gallery and along the channel-set shoulders.

FAQ

Why are round side diamonds paired with a radiant center?
The round side diamonds soften the straight edges of the radiant cut and create a balanced three-stone appearance.

Are the shoulder diamonds secure?
Yes. The shoulder diamonds are recessed within channel-style settings that help protect them during everyday wear.

Is this ring comfortable for daily wear?
The slim polished shank and open gallery provide a comfortable fit while supporting the larger center diamond securely.

Which metal best suits this design?
White gold and platinum highlight the crisp lines of the radiant center, while yellow and rose gold create stronger visual contrast around the diamonds.

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