Radiant Lab Grown Diamond Marquise Engagement Ring

IGI Report IncludedMade to OrderInsured Delivery

radiant diamond marquise engagement ring in yellow gold

1 of 12

$600.00

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.

Understand your certificates →Certificate details →

Metal:

Center Diamond:

Choose your fit

Ring size Choose one

Forever, A & J

Live preview

Engraving 0 / 20

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 · Halo

Center

Radiant Cut

Carat

1 ct

Customizable

Metal

Customizable

Setting

Halo

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
Ring style	Radiant engagement ring with graduated marquise shoulders and a hidden halo	Included as shown
Center diamond	Radiant · 9.00 × 7.00 mm · Approx. 3.000 ct	Yes — 1 to 4.5 ct
Marquise side diamonds	6 diamonds · 5.00 × 2.50 mm · Approx. 0.600 ct total	Included and scaled with the center
Hidden-halo diamonds	20 round diamonds · 1.00 mm · Approx. 0.100 ct total	Included and scaled with the setting
Total diamond weight	Approx. 3.700 ct · 27 diamonds	Varies with center size
Stone type	Lab Grown Diamond	Lab Grown Diamond
Setting	Four-prong radiant basket, hidden halo and individually prong-set marquise shoulders	Scaled to suit the selected center
Band	Graduated side-stone shoulders with a plain lower shank	Included as shown
Reference size	US 8	Customer selects
Finish	High Polish	Included

Diamond details

Shape	Size	Qty	Weight (approx.)
Radiant center	9.00 × 7.00 mm	1	3.000 ct
Marquise side stones	5.00 × 2.50 mm	6	0.600 ct
Round hidden-halo diamonds	1.00 mm	20	0.100 ct
Total	—	27	3.700 ct

At a glance

A radiant Lab Grown Diamond marquise engagement ring from Signora Jewels.

As shown: a 3.000 ct radiant center measuring 9.00 × 7.00 mm, six marquise side stones and a 20-diamond hidden halo.

Twenty-seven diamonds total Approx. 3.700 ct in a four-prong center setting with graduated diamond shoulders.

Made to order in silver, 9K/14K/18K yellow, white or rose gold, and platinum.

Made to order — the price updates with your selection. Change the center dimensions or shoulder proportions through our custom jewelry service.

Signora Jewels sets the 9.00 × 7.00 mm radiant center above a narrow hidden halo, then runs three marquise diamonds down each shoulder. The marquise stones sit point-to-point, so their outlines carry the long rectangular center into the band without leaving a blunt break at either side.

Four corner prongs hold the radiant while keeping its clipped corners visible. Beneath it, twenty 1.00 mm rounds circle the basket and catch light from the side rather than competing with the center from above.

The six marquise diamonds total Approx. 0.600 ct. Their brilliant facets throw faster flashes beside the broader pattern of the radiant, and the plain lower shank keeps the palm side free of exposed stone edges.

Design highlights

Radiant Lab Grown Diamond center, Approx. 3.000 ct as shown
Approx. 9.00 × 7.00 mm center dimensions
Six marquise side diamonds totaling Approx. 0.600 ct
Approx. 5.00 × 2.50 mm dimensions for each marquise
Twenty 1.00 mm hidden-halo diamonds totaling Approx. 0.100 ct
Four-prong center basket with clipped-corner coverage
Graduated diamond shoulders and a plain lower shank
Approx. 3.700 ct total diamond weight as shown

The side profile carries the quiet detail. The hidden halo sits directly below the radiant’s girdle, while the first marquise on each shoulder rises toward the basket and the remaining stones step down into the band.

Diamond & Ring Details

Specification	Details
Center stone	Radiant · 9.00 × 7.00 mm · Approx. 3.000 ct as shown
Side stones	6 marquise diamonds · 5.00 × 2.50 mm · Approx. 0.600 ct total
Hidden halo	20 round diamonds · 1.00 mm · Approx. 0.100 ct total
Total diamond weight	Approx. 3.700 ct across 27 diamonds as shown
Center setting	Four-prong radiant basket
Accent setting	Prong-set hidden halo and individually set marquise shoulders
Reference size	US 8
Finish	High Polish

Measurements and weights are approximate. The basket, hidden halo and metal weight scale with the selected center size.

About Lab Grown Diamonds

A radiant cut combines a rectangular outline with brilliant-style faceting. The marquise side stones use pointed ends and elongated brilliant facets, creating smaller flashes that move outward along the shoulders.

Lab grown diamonds have the same carbon crystal structure, hardness and optical properties as mined diamonds. They are graded using the same cut, color, clarity and carat standards.

Metal, Care & Fit

Choose silver, 9K/14K/18K gold in yellow, white or rose, or platinum. 9K contains more strengthening alloy, while 18K contains more gold and carries richer color; compare the options in the metal guide.

Order in your known US size. The radiant center and six marquise stones spread across the finger, so an accurate fit helps keep the setting upright; use the ring size and fit guide. Clean beneath the center basket and between the marquise settings with warm water, mild soap and a soft brush.

FAQ

Can I choose another center diamond size?
Yes. The radiant center is available from 1 to 4.5 ct, and the basket, hidden halo and metal weight scale with the selected carat. The photographed configuration uses an Approx. 3.000 ct center measuring 9.00 × 7.00 mm.

What is the total diamond weight?
The photographed configuration totals Approx. 3.700 ct across 27 diamonds. That includes the 3.000 ct radiant center, six marquise diamonds totaling 0.600 ct and twenty hidden-halo diamonds totaling 0.100 ct.

How are the marquise diamonds arranged?
Three marquise diamonds run along each shoulder with their pointed ends aligned toward the center and band. Each measures approximately 5.00 × 2.50 mm.

Where is the hidden halo?
The hidden halo sits beneath the radiant center around the outside of its basket. Its twenty 1.00 mm round diamonds are most visible from the side and angled views.

How is the radiant center held?
The radiant center is secured by four prongs positioned at its clipped corners. This protects the corners while leaving the long sides and broad face visible.

Will a wedding band sit beside this ring?
A straight wedding band sits close to the plain lower shank, though the raised marquise settings can leave a narrow gap near the head. A gently contoured band follows the side-stone line more closely.

How does a radiant cut compare with an emerald cut?
A radiant cut uses brilliant-style faceting for tighter sparkle, while an emerald cut uses long step facets for broader flashes. This ring pairs the radiant’s active light pattern with six brilliant-cut marquise side stones.

Are the center and accent diamonds included?
Yes. Signora Jewels includes the selected radiant center, all six marquise side stones and all twenty hidden-halo diamonds in the completed ring.

Your cart is empty