Marquise Cut Lab Grown Diamond Six-Prong Engagement Ring

IGI Report IncludedMade to OrderInsured Delivery

1 of 8

$353.00

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.

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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

Marquise Cut · Solitaire

Center

Marquise 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	Marquise Cut · approx. 15.30 × 7.60 mm · approx. 3.00 ct reference center	Choose from 1–4.5 ct
Accent diamonds	None · 0 stones · 0.00 ct	No accent diamonds across the center options
Total diamond weight	Approx. 3.00 ct · 1 stone	Matches the selected center weight
Stone type	Lab Grown Diamond	Lab Grown Diamond across all options
Diamond quality	F color · VS1 clarity	Same quality across center options
Setting	Six-Prong · one claw over each pointed end and four along the sides	Same Six-Prong design; dimensions vary with center
Band	Plain polished shank without diamond-set shoulders	Same plain-band design
Finish · Occasion	High Polish · Engagement, Anniversary	All metal and center options

At a glance

A marquise lab grown diamond six-prong engagement ring from Signora Jewels.

Reference center: approx. 3.00 ct marquise, 15.30 × 7.60 mm, in a Six-Prong setting; 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 marquise center from 1 to 4.5 ct.

Signora Jewels sets the marquise in this engagement ring with six claws: one over each pointed end and four along the sides.

The reference diamond measures approximately 15.30 × 7.60 mm and weighs 3.00 ct. The band has no accent stones.

Design highlights

Marquise reference center, approximately 3.00 ct and 15.30 × 7.60 mm
Selectable center weights from 1 to 4.5 ct
Six-Prong setting with a claw directly over each pointed end
Four side claws with sections of the curved diamond edge visible between them
Plain polished lower shank, estimated at 1.80 mm wide and 1.80 mm thick for the reference design
No halo, side diamonds or diamond-set shoulders

The plain shoulders meet the marquise at its waist. Its pointed ends extend well beyond the band, without a halo making the outline broader.

Diamond & Ring Details

Specification	Details
Reference center	Marquise Cut · approx. 15.30 × 7.60 mm · approx. 3.00 ct
Center options	1 ct, 1.5 ct, 2 ct, 2.5 ct, 3 ct, 3.5 ct, 4 ct, 4.5 ct
Reference total weight / count	Approx. 3.00 ct · 1 diamond
Accent diamonds	None · 0 stones · 0.00 ct
Setting	Six-Prong with two end claws and four side claws
Band width at base	Estimated 1.80 mm for the reference design
Band thickness at base	Estimated 1.80 mm for the reference design
Shoulder width	Estimated 1.85–2.00 mm for the reference design
Setting height	Estimated 7.5–8.0 mm for the reference design
Finish	High Polish

Measurements are approximate references for the 3.00 ct design; final dimensions vary with the selected center.

About Lab Grown Diamonds

The single marquise lab grown diamond supplies the full selected weight, with no halo or side diamonds.

Metal, Care & Fit

Yellow and rose gold outline all six claws; white metals reduce the contrast. Brush gently around the end prongs using the care guidance.

FAQ

How do the six prongs hold the marquise’s two points?
Two of the six prongs sit directly over the marquise’s pointed ends; the other four hold its curved sides. Portions of the side edges remain exposed between the claws. Remove the ring for lifting and other activities that put pressure on the setting.

Does every marquise center option measure 15.30 × 7.60 mm?
The approximately 15.30 × 7.60 mm dimensions apply to the 3.00 ct reference center only. The 1–4.5 ct choices retain the Six-Prong design, but the diamond’s dimensions and setting proportions vary with the selected center.

Will a straight wedding band sit flush beside this long marquise?
The reference shank is estimated at 1.80 mm wide, but that measurement does not establish clearance beneath the marquise’s pointed ends. Check a companion band against the completed setting to establish how closely the two rings sit together.

How should I clean around the marquise’s two end prongs?
The marquise has a claw over each point and four more along the sides. Use warm water, mild soap and a soft brush around each metal-to-stone contact, then rinse thoroughly and pat dry without pulling cloth across the pointed ends.

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