Round Lab Grown Diamond Solitaire Engagement Ring

IGI Report IncludedMade to OrderInsured Delivery

1 of 10

$755.00

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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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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.

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.

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

Round Brilliant · Solitaire

Center

Round Brilliant

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.

Detail	In the photos	Customizable
Center diamond	Round Brilliant · 7.50 mm · approx. 1.50 ct	1 ct, 1.5 ct, 2 ct, 2.5 ct, 3 ct, 3.5 ct, 4 ct, 4.5 ct
Accent diamonds	None	—
Total diamond weight	Approx. 1.50 ct	Varies with center size
Stone type	Lab Grown Diamond	—
Setting	Six-Prong Cathedral Open Basket Solitaire	—
Finish · Occasion	High Polish · Engagement, Anniversary, Bridal	—

At a glance

A round lab grown diamond solitaire engagement ring from Signora Jewels.

An approximately 1.50 ct round brilliant measuring 7.50 mm is secured in a classic six-prong cathedral open basket.

Made to order in 11 metals: Silver, 10K/14K/18K Gold (Yellow, White and Rose) and Platinum.

Each metal color is shown in the photos. Choose your preferred center diamond weight and metal from the options on this page.

The timeless six-prong cathedral setting allows the round brilliant to remain the clear focal point while offering balanced support around the entire diamond. At Signora Jewels, the open basket lifts the center above the band so light can enter freely beneath the pavilion, enhancing the brilliance of the stone without adding unnecessary design elements.

The approximately 1.90 mm comfort-fit shank keeps the profile refined and comfortable for everyday wear. Cathedral shoulders flow naturally into the basket, creating a graceful side view while maintaining the clean appearance expected from a classic solitaire.

Browse our engagement rings, compare diamond shapes in the diamond stone guide, or explore precious metal options in our metal guide.

Design highlights

Round brilliant center shown at approximately 1.50 ct
Customizable center diamond from 1 ct to 4.5 ct
Classic six-prong cathedral open basket
Open gallery for maximum light return
Comfort-fit shank approximately 1.90 mm wide
Made to order in 11 precious metal options

The clean cathedral profile places complete attention on the round brilliant diamond while allowing light to pass through the open basket from every direction. Its balanced proportions make this design equally suited to everyday wear and lifelong occasions.

Diamond & Ring Details

Specification	Details
Center stone	Round Brilliant · 7.50 mm · approx. 1.50 ct (shown)
Accent stones	None
Total weight / count	Approx. 1.50 ct · 1 Diamond
Setting	Six-Prong Cathedral Open Basket Solitaire
Center options	1 ct, 1.5 ct, 2 ct, 2.5 ct, 3 ct, 3.5 ct, 4 ct and 4.5 ct
Finish	High Polish

Measurements are approximate. Your selected center diamond weight determines the final proportions of the finished ring.

About Lab Grown Diamonds

The round brilliant is engineered to maximize light return through its symmetrical facet arrangement, producing exceptional sparkle and balanced brilliance. Every center diamond is F color, VS1 clarity and , selected to complement the proportions of this cathedral solitaire.

Metal, Care & Fit

Available in Silver, 10K, 14K and 18K Yellow, White and Rose Gold, plus Platinum. Clean beneath the open basket with warm water, mild soap and a soft brush to remove everyday buildup and maintain the brilliance of the center diamond.

FAQ

Why does this ring use six prongs?
Six evenly spaced prongs provide balanced protection around the round brilliant while keeping the diamond open to incoming light.

What is the benefit of the cathedral basket?
The cathedral shoulders support the basket while lifting the center stone into stronger light. The open gallery beneath also makes routine cleaning easier.

Can this ring be paired with a wedding band?
Yes. The cathedral basket allows many straight wedding bands to sit close, while contoured bands can follow the raised profile even more precisely.

Which metal color best complements this solitaire?
White gold and platinum maximize the brilliance of the round diamond, while yellow and rose gold create warm contrast around the classic six-prong setting.

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