Marquise Cut Lab Grown Diamond Prong Engagement Ring

IGI Report IncludedMade to OrderInsured Delivery

Marquise cut lab grown diamond engagement ring in white gold with elongated Dutch marquise center and alternating marquise and round diamond shoulders.

1 of 10

$700.00

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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.

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

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	Dutch Marquise Cut · approx. 12.5 × 6.3 mm · 1.70 ct	1–4.5 ct
Marquise accents	4 Marquise Cut · approx. 0.38 ct total	Mixed-shape shoulder design retained
Round accents	8 Round Brilliant · approx. 0.24 ct total	Shared-prong arrangement retained
Total diamond weight	Approx. 2.32 ct · 13 diamonds	Varies with center size
Stone type	Lab Grown Diamond	Lab Grown Diamond
Setting	Prong-set center with open gallery	Made to fit the selected center
Shoulders	Alternating marquise and round diamonds in shared-prong settings	11 metal options
Finish · Occasion	High Polish · Engagement, Anniversary, Bridal	Made to order

Diamond details

Shape	Size	Qty	Weight (approx.)
Dutch Marquise Cut center	12.5 × 6.3 mm	1	1.70 ct
Marquise Cut accents	Individual dimensions not specified	4	0.38 ct total
Round Brilliant accents	Individual dimensions not specified	8	0.24 ct total
Total	Reference configuration	13	2.32 ct

At a glance

A Dutch marquise-cut lab grown diamond engagement ring with alternating diamond shoulders from Signora Jewels.

The 1.70 ct center measures approximately 12.5 × 6.3 mm. Four marquise diamonds total 0.38 ct, and eight round brilliant diamonds total 0.24 ct. Approximately 2.32 ct overall.

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

Made to order with your choice of center diamond weight and metal.

At Signora Jewels, we set the 12.5 × 6.3 mm Dutch marquise between alternating round and marquise diamonds. The center has an elongated body with two pointed ends, while the smaller stones step along the shoulders in separate prong settings.

Four marquise accents carry approximately 0.38 ct and eight round brilliant accents add 0.24 ct. The shoulder sections measure approximately 3.0–3.6 mm across before narrowing to a 2.00 mm lower shank.

Design highlights

Dutch marquise-cut center, customizable from 1 to 4.5 ct
Reference center approximately 12.5 × 6.3 mm and 1.70 ct
Four marquise-cut accents totaling approximately 0.38 ct
Eight round brilliant accents totaling approximately 0.24 ct
Alternating mixed-shape diamonds in open shared-prong shoulders
Raised center setting with an open gallery and high-polish finish

The reference center rises approximately 6.5–7.0 mm above the band. From above, the small marquise diamonds repeat the pointed outline of the center; the round stones interrupt that pattern with circular facets. Explore other engagement rings or compare metal options for the prong settings.

Diamond & Ring Details

Specification	Details
Center diamond	Dutch Marquise Cut · approx. 12.5 × 6.3 mm · 1.70 ct reference
Side marquise diamonds	4 stones · approx. 0.38 ct total
Round shoulder diamonds	8 stones · approx. 0.24 ct total
Total weight / count	Approx. 2.32 ct · 13 diamonds at reference
Setting	Prong-set marquise center with raised open basket
Shoulders	Alternating marquise and round shared-prong settings
Center options	1, 1.5, 1.7, 2, 2.5, 3, 3.5, 4 and 4.5 ct
Band width	Approx. 2.00 mm at base
Band thickness	Approx. 1.70 mm at base
Shoulder width	Approx. 3.0–3.6 mm
Setting height	Approx. 6.5–7.0 mm at reference
Finish	High Polish

Center measurements and total diamond weight reflect the 1.70 ct reference. Final proportions depend on the selected center diamond.

About Lab Grown Diamonds

The Dutch marquise has a long, pointed outline, with brilliant-style facets across its center. The shoulders pair four smaller marquise cuts with eight round brilliant diamonds, giving the band two contrasting diamond shapes.

Metal, Care & Fit

Choose silver, yellow gold, white gold, rose gold or platinum. The mixed-shape shoulders widen to approximately 3.0–3.6 mm, while the lower band measures approximately 2.00 mm across.

For cleaning and care, use warm water, mild soap and a soft brush around the raised center and individual shoulder settings. Rinse thoroughly and dry with a lint-free cloth.

FAQ

What is different about the Dutch marquise center?
The reference Dutch marquise measures approximately 12.5 × 6.3 mm at 1.70 ct. Its elongated body ends in two pronounced points, and the side prongs hold the stone while leaving those pointed ends visible.

How are the 12 accent diamonds arranged?
The shoulders contain four marquise diamonds totaling approximately 0.38 ct and eight round brilliant diamonds totaling 0.24 ct. Their shapes alternate along open shared-prong sections on either side of the center.

Are the pointed ends of the center diamond protected?
The reference specifies protective support at both ends of the Dutch marquise. The front image shows the pointed tips projecting beyond the visible side claws, so the final end-support construction should be confirmed before wear.

Will this ring sit flush beside a wedding band?
The reference setting stands approximately 6.5–7.0 mm high, with mixed-shape diamond settings along shoulders measuring 3.0–3.6 mm wide. A flush fit depends on the finished gallery clearance and the wedding band's profile.

How should I clean the alternating marquise and round diamonds?
Use warm water, mild soap and a soft brush around the 12 shoulder diamonds, working gently between the shared prongs. Avoid pressure on the pointed ends of the marquise stones, then rinse and dry thoroughly.

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