Dutch Marquise Lab Grown Diamond Three-Stone Engagement Ring

IGI Report IncludedMade to OrderInsured Delivery

1 of 8

$690.00

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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.

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 · Three Stone

Center

Marquise Cut

Carat

1 ct

Customizable

Metal

Customizable

Setting

Three Stone

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 · 12.00 × 5.90 mm · approx. 1.70 ct	1–4.5 ct
Side diamonds	2 tapered baguette diamonds · approx. 0.12 ct total	Three-Stone layout
Total diamond weight	approx. 1.82 ct · 3 diamonds	Varies with selected center
Stone type	Lab Grown Diamond	—
Setting	Six-Prong Three-Stone with tapered baguette sides and open gallery	—
Finish · Occasion	High Polish · Engagement, Anniversary	—

Diamond details

Shape	Size	Qty	Weight (approx.)
Dutch Marquise Cut	12.00 × 5.90 mm	1	1.70 ct
Tapered Baguette Cut	Not specified	2	0.12 ct total
Total	—	3	1.82 ct

At a glance

A Dutch marquise lab grown diamond three-stone engagement ring from Signora Jewels.

A 1.70 ct, 12.00 × 5.90 mm Dutch marquise center is flanked by 2 tapered baguette diamonds totaling approx. 0.12 ct. Approx. 1.82 ct total.

Made to order in 11 metals: silver, 10K/14K/18K gold (yellow, white, rose) and platinum.

Choose your center weight and metal for this made-to-order ring.

Signora Jewels sets the 12.00 × 5.90 mm Dutch marquise between two tapered baguettes, giving this three-stone ring a clean step from the pointed center into the polished shank. The baguettes widen beside the center and narrow toward the band, so the 1.70 ct marquise keeps the strongest outline.

The open gallery rises approximately 6.5–7.0 mm. At the base, the shank measures about 1.80 mm wide and 1.50 mm thick, keeping the lower band restrained beneath the three-stone setting.

Design highlights

1.70 ct Dutch marquise center in the reference design
Center measures approx. 12.00 × 5.90 mm
2 tapered baguette side diamonds totaling approx. 0.12 ct
Six-Prong Three-Stone setting
Open gallery with tapered shoulders
Approx. 1.82 ct total diamond weight

The baguettes bring straight step facets beside the more complex Dutch marquise pattern. Their taper points toward the center, then drops into a plain shank without pavé or extra stones.

Diamond & Ring Details

Specification	Details
Center stone	Dutch Marquise Cut · 12.00 × 5.90 mm · approx. 1.70 ct in the photos
Side stones	2 tapered baguette diamonds · approx. 0.12 ct total
Total diamond weight	approx. 1.82 ct in the photographed configuration
Diamond count	3
Setting	Six-Prong Three-Stone with tapered baguette sides and open gallery
Center options	1, 1.5, 1.7, 2, 2.5, 3, 3.5, 4 and 4.5 ct
Finish	High Polish

Measurements are approximate; your selected center weight sets the final diamond dimensions and total weight.

About Lab Grown Diamonds

The Dutch marquise carries its visual spread along the finger, while the tapered baguettes use long step facets to draw the eye back toward the center. Read more about shape and proportion in the diamond stone guide.

Metal, Care & Fit

White gold and platinum keep the three settings visually close to the diamonds; yellow and rose gold create stronger contrast around the baguette sides. Compare choices in the metal guide. Clean beneath the open gallery and around both baguette settings with warm water, mild soap and a soft brush.

FAQ

Why are tapered baguettes paired with the Dutch marquise?
The two baguettes narrow toward the shank and point visually toward the center. Their straight step facets create a clear contrast beside the elongated Dutch marquise.

How much diamond weight is in the side stones?
The two tapered baguette diamonds total approximately 0.12 ct. Together with the 1.70 ct reference center, the photographed configuration totals approximately 1.82 ct.

How are the pointed ends of the Dutch marquise protected?
The center uses a Six-Prong setting with support at both pointed ends and along the sides. The 12.00 × 5.90 mm reference outline remains visible from above.

How high does the center sit?
The setting rises approximately 6.5–7.0 mm. The open gallery separates the Dutch marquise from the tapered shoulders and leaves access beneath the center.

Will this ring work with a straight wedding band?
The three-stone gallery can leave a small gap beside a straight band. A contoured band follows the baguette-and-center profile more closely.

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