Radiant Cut Lab Grown Diamond Three-Stone Engagement Ring

IGI Report IncludedMade to OrderInsured Delivery

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$497.00

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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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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.

For ChristmasOrder by Monday 30 November for delivery before 25 December. Holiday gift guide

Arrives 7 business days to make, then 5–8 insured & tracked.

30-day returns Courier, insurance & duties covered. No restocking fee.

Duties & taxesPrepaid at checkout. Nothing extra to pay on delivery.

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

1 ct

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 Cut · 8.2 × 6.1 mm · approx. 2.00 ct	1–4.5 ct
Side diamonds	2 Marquise Cut · approx. 0.06 ct each · 0.12 ct total	Two marquise side stones
Total diamond weight	Approx. 2.12 ct · 3 diamonds	Varies with center size
Stone type	Lab Grown Diamond	Lab Grown Diamond
Setting	Three-Stone with raised four-prong center basket	Basket adjusted to selected center
Side setting	Individually prong-set marquise diamonds	Three-stone arrangement retained
Band	Plain polished shank · no pavé or halo	11 metal options
Finish · Occasion	High Polish · Engagement, Anniversary, Bridal	Made to order

Diamond details

Shape	Size	Qty	Weight (approx.)
Radiant Cut	8.2 × 6.1 mm	1	2.00 ct
Marquise Cut	Individual dimensions not specified	2	0.06 ct each · 0.12 ct total
Total	Reference configuration	3	2.12 ct

At a glance

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

The reference design pairs an 8.2 × 6.1 mm, 2.00 ct radiant center in a four-prong basket with two marquise diamonds totaling 0.12 ct. Approximately 2.12 ct across three diamonds.

Made to order in 11 metals: silver, 9K/14K/18K gold (yellow, white, rose) and platinum.

Choose your center diamond weight and metal from the options on this page.

At Signora Jewels, we build this three-stone ring around a radiant center that measures approximately 8.2 × 6.1 mm at 2.00 ct. Four rounded corner prongs hold the diamond above an open gallery. Two 0.06 ct marquise diamonds, angled toward the center, complete the line of stones.

The metal shank stays plain from the side stones to the base. At approximately 1.50 mm wide at the bottom, it doesn't compete with the rectangular center. There is no pavé or halo to interrupt that shape.

Design highlights

Elongated radiant-cut center, customizable from 1 to 4.5 ct
Two marquise-cut side diamonds totaling approximately 0.12 ct
Four rounded corner prongs securing the center diamond
Raised, open three-stone gallery
Plain polished shank, approximately 1.50 mm wide at the base
No pavé diamonds or surrounding halo

The reference basket rises approximately 6.5–7.0 mm. Look at the ring from the side and you can see space underneath all three diamonds, while the marquise points bring your eye back to the radiant cut.

Diamond & Ring Details

Specification	Details
Center diamond	Radiant Cut · 8.2 × 6.1 mm · approx. 2.00 ct reference
Side diamonds	2 Marquise Cut · approx. 0.06 ct each
Total diamond weight	Approx. 2.12 ct at reference
Total diamond count	3
Setting	Three-Stone with Four-Prong center basket
Side settings	Individually prong-set marquise diamonds
Center options	1, 1.5, 2, 2.5, 3, 3.5, 4 and 4.5 ct
Band width	Approx. 1.50 mm at base
Band thickness	Approx. 1.70 mm at base
Setting height	Approx. 6.5–7.0 mm at reference
Gallery	Open three-stone construction
Finish	High Polish

Measurements are approximate. The selected center diamond weight determines the final center dimensions, setting proportions and total diamond weight.

About Lab Grown Diamonds

The radiant cut combines a rectangular outline with clipped corners and brilliant-style facets. Its broad face catches light across the center, while the smaller marquise diamonds bring two pointed outlines into the three-stone arrangement.

Metal, Care & Fit

Choose silver, 9K, 14K or 18K gold in yellow, white or rose, or platinum. The plain polished shank has no small diamonds along its lower half. The center sits raised above the open gallery, so clearance with a straight wedding band depends on the band profile.

For cleaning and care, use warm water, mild soap and a soft brush around the four center prongs and the two marquise settings. Rinse thoroughly and dry with a lint-free cloth. Avoid pressure on the pointed ends of the side stones.

FAQ

How is the radiant-cut center diamond secured?
Four rounded prongs hold the radiant diamond at its corners. The raised basket keeps the center supported above the open gallery while leaving its rectangular outline visible.

What do the two marquise side diamonds add to this ring?
The two marquise diamonds weigh approximately 0.06 ct each, or 0.12 ct together. Their pointed outlines face toward the radiant center, creating a three-stone arrangement without pavé along the shank.

Is this three-stone ring suitable for everyday wear?
The plain polished shank has no small pavé diamonds to maintain. The center sits approximately 6.5–7.0 mm high in the reference design, so protect the raised basket and marquise tips from knocks during strenuous activities.

Will a straight wedding band sit flush beside this ring?
The radiant center is raised above an open three-stone gallery. A straight wedding band needs sufficient clearance beneath the center and beside the marquise settings; a contoured band can follow the ring's outline more closely.

How should I clean the marquise side-stone settings?
Use warm water, mild soap and a soft brush around the two marquise diamonds. Clean gently beneath the open gallery, rinse well and check that the small prongs remain secure around each pointed end.

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