Cushion Cut Lab Grown Diamond Split Shank Engagement Ring

IGI Report IncludedMade to OrderInsured Delivery

Cushion old mine cut lab grown diamond split shank engagement ring in yellow gold with two curved arms and four tapered prongs

1 of 8

$628.00

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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. 1.0 ct lab-grown diamond · IGI report · Signora Certificate included.

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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.

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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

Cushion Cut · Solitaire

Center

Cushion Cut

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	Details
Center diamond	Cushion Old Mine Cut · approx. 6.50 × 5.95 × 4.00 mm · approx. 1.00 ct
Accent diamonds	None · 0 stones · 0.00 ct
Total diamond weight	Approx. 1.00 ct · 1 stone
Stone type	Lab Grown Diamond
Diamond quality	F color · VS1 clarity
Setting	Split Shank · two curved arms framing a center held by four tapered prongs
Prong placement	One at each end of the cushion and one at each side midpoint
Band	Plain polished lower shank · estimated 2.80 mm wide and 1.50 mm thick
Shoulder width	Estimated 4.5–5.5 mm across the split section
Setting height	Estimated 6.0–6.5 mm
Finish · Occasion	High Polish · Engagement

At a glance

A cushion old mine-cut lab grown diamond split-shank engagement ring from Signora Jewels.

One approx. 1.00 ct cushion old mine-cut diamond, 6.50 × 5.95 × 4.00 mm, in a Split Shank setting with four prongs; 0 accent diamonds, 0.00 ct.

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

Made to order in your chosen metal with a fixed, approximately 1.00 ct cushion old mine-cut center.

Signora Jewels splits the shoulders of this engagement ring into two polished arms that bow around the cushion. The space beside the diamond stays open.

Four tapered prongs hold the approximately 1.00 ct center, estimated at 6.50 × 5.95 × 4.00 mm. The lower shank is estimated at 2.80 mm wide.

Design highlights

One cushion old mine-cut center, approximately 1.00 ct and 6.50 × 5.95 × 4.00 mm
Split Shank design with two polished arms framing the diamond
Four tapered prongs at the cushion’s ends and side midpoints
Open split section spanning an estimated 4.5–5.5 mm
Plain polished lower shank, estimated at 2.80 mm wide and 1.50 mm thick
No halo, side diamonds or diamond-set shoulders

The split section spans an estimated 4.5–5.5 mm, including the open space. You see a wider outline around the stone without a solid panel of metal filling it.

About Lab Grown Diamonds

One cushion old mine-cut lab grown diamond sits between the curved arms; no accent stones contribute to the approximately 1.00 ct total.

Metal, Care & Fit

Clean the four prongs and the spaces between the arms with a soft brush, following the care guidance.

FAQ

Is the split frame around the 1.00 ct cushion two separate rings?
The two curved arms belong to one split-shank ring, not a pair of stacked bands. They frame the old mine-cut center, with open space between them beside the diamond.

Where do the four prongs sit on the old mine-cut cushion?
The four tapered prongs sit at the two ends and the midpoint of each side, rather than on the cushion’s four corners. Portions of the rounded corners and edges remain exposed, so remove the ring for lifting or work that knocks the setting.

Does the 4.5–5.5 mm split section leave room for a straight wedding band?
The 4.5–5.5 mm estimate spans the split frame, while 2.80 mm describes the lower shank. Neither measurement establishes clearance beside the curved arms. Check a companion band against the finished ring so it does not press on an arm or prong.

How do I clean the spaces between the arms and the cushion?
The open spaces sit beside the cushion between the polished split-shank arms. Use warm water, mild soap and a soft brush around the four prongs and along the inner curves, then rinse thoroughly and pat dry. Do not pull cloth through the gaps.

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