Elongated Cushion Lab Grown Diamond Split Cathedral Ring

IGI Report IncludedMade to OrderInsured Delivery

Elongated cushion Lab Grown Diamond solitaire engagement ring in yellow gold with a split cathedral shank and four-prong open basket.

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$799.00

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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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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

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Standard-design returns30-day eligibility

Final inspectionChecked before dispatch

About This Ring

Cushion Cut · Solitaire

Center

Cushion Cut

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	Elongated Cushion Cut · 6.47 × 5.29 × 3.48 mm · approx. 1.00 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. 1.00 ct	Varies with center size
Stone type	Lab Grown Diamond	—
Setting	Four-Prong Open Basket Split Cathedral Solitaire	—
Finish · Occasion	High Polish · Engagement, Anniversary, Bridal	—

At a glance

An elongated cushion lab grown diamond split cathedral engagement ring from Signora Jewels.

An approximately 1.00 ct elongated cushion diamond measuring 6.47 × 5.29 × 3.48 mm is secured in a four-prong open basket above a split cathedral shank.

Made to order in 11 metals: Silver, 9K/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 split cathedral shoulders rise from the band before narrowing beneath the elongated cushion, creating an open profile that keeps the center diamond visually light. At Signora Jewels, the four-prong basket holds each corner securely while leaving the pavilion exposed to incoming light through the open gallery.

The approximately 1.80 mm comfort-fit shank balances the wider top without feeling heavy on the finger. With an approximate setting height of 6.00 mm, the diamond remains prominent while sitting comfortably for everyday wear.

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

Design highlights

Elongated cushion center shown at approximately 1.00 ct
Customizable center diamond from 1 ct to 4.5 ct
Split cathedral shank with open profile
Four-prong open basket solitaire
Comfort-fit shank approximately 1.80 mm wide
Made to order in 11 precious metal options

The split shoulders create negative space beneath the center instead of adding extra metal. This keeps the elongated cushion as the focus while giving the side profile a lighter, architectural appearance.

Diamond & Ring Details

Specification	Details
Center stone	Elongated Cushion Cut · 6.47 × 5.29 × 3.48 mm · approx. 1.00 ct (shown)
Accent stones	None
Total weight / count	Approx. 1.00 ct · 1 Diamond
Setting	Four-Prong Open Basket Split Cathedral 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 elongated cushion combines softly rounded corners with brilliant-cut facets that return lively sparkle across a rectangular outline. Every center diamond is F color, VS1 clarity and , selected to suit the proportions of this split cathedral design.

Metal, Care & Fit

Available in Silver, 9K, 14K and 18K Yellow, White and Rose Gold, plus Platinum. Clean beneath the open basket using warm water, mild soap and a soft brush to remove everyday buildup and maintain maximum brilliance.

FAQ

Why does the split cathedral shank make the ring look different?
The shoulders divide before reaching the basket, creating open space beneath the center stone. This keeps the profile lighter while naturally drawing attention to the elongated cushion.

Does the open basket help the diamond sparkle?
Yes. The open gallery allows light to reach the pavilion from below, helping the brilliant-cut facets return more light through the top of the diamond.

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

Which metal color best suits this design?
White gold and platinum highlight the crisp split shoulders, while yellow and rose gold create a warmer contrast around the elongated cushion center.

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