Radiant Cut Lab Grown Diamond Three-Stone Engagement Ring

IGI Report IncludedMade to OrderInsured Delivery

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$905.00

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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

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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 · 9.00 × 7.00 mm · approx. 3.03 ct	1, 1.5, 2, 2.5, 3, 3.03, 3.5, 4, 4.5
Side diamonds	2 Custom Baguette · 6.00 × 5.00 mm · approx. 1.17 ct total	Scaled to center size
Total diamond weight	approx. 4.21 ct · 3 stones	Varies with center size
Stone type	Lab Grown Diamond	—
Setting	Four-Prong Three-Stone	—
Finish · Occasion	High Polish · Engagement, Anniversary, Bridal	—

Diamond details

Shape	Size	Qty	Weight (Approx.)
Radiant	9.00 × 7.00 mm	1	3.03 ct
Custom Baguette	6.00 × 5.00 mm	2	1.17 ct total
Total	—	3	4.21 ct

At a glance

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

A 9.00 × 7.00 mm radiant center of approximately 3.03 ct is paired with two custom baguette side diamonds totaling approximately 1.17 ct, creating an overall weight of approximately 4.21 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.

The rectangular radiant center sits slightly higher than the tapered side stones, allowing the clipped corners and brilliant faceting to remain the visual focus. Four corner prongs secure the center while keeping the outline open from every viewing angle.

The custom baguette side diamonds narrow gently toward the band, creating a balanced transition without competing with the center stone. Their clean step-cut appearance contrasts beautifully against the brilliant sparkle of the radiant cut.

Design Highlights

Radiant center shown at approximately 3.03 ct
Two custom baguette side diamonds totaling approximately 1.17 ct
Classic three-stone engagement design
Four-prong center setting
High polish comfort-fit band
Approximate total diamond weight 4.21 ct

The combination of a brilliant radiant center with sleek tapered baguette sides creates a balanced profile that remains timeless while emphasizing finger length. Explore our Three Stone Rings, compare diamond shapes in our Diamond Stone Guide, or browse our Metal Guide to choose your preferred finish.

About Lab Grown Diamonds

The radiant cut combines trimmed corners with brilliant-style facets that produce bright flashes across the stone. The custom baguette side diamonds introduce clean geometric lines, creating contrast without reducing the brilliance of the center diamond.

Metal, Care & Fit

White gold and platinum emphasize the crisp edges of the radiant and baguette diamonds, while yellow and rose gold provide a warmer frame around the stones. Clean periodically using warm water, mild soap and a soft brush beneath the gallery and around each prong.

FAQ

Why are baguette side diamonds used with a radiant center?
The tapered baguette diamonds frame the rectangular center without overpowering it, allowing the radiant diamond to remain the focal point.

Is the center diamond securely held?
Yes. Four substantial corner prongs protect the clipped corners while keeping the table open to maximize light return.

Does this design sit high?
The center is elevated enough to enhance light performance while maintaining a balanced everyday profile.

Which metal best complements this style?
White gold and platinum create the most seamless appearance around the radiant and baguette diamonds, while yellow and rose gold offer stronger visual contrast.

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