Dutch Marquise Lab Grown Diamond Cathedral Engagement Ring

IGI Report IncludedMade to OrderInsured Delivery

1 of 9

$900.00

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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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Forever, A & J

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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

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 · 10.50 × 5.40 mm · approx. 1.00 ct	1–4.5 ct
Accent diamonds	None	None
Total diamond weight	approx. 1.00 ct · 1 stone	Varies with center size
Stone type	Lab Grown Diamond	—
Setting	Four-Prong Cathedral	Scales with center
Band	Ocean-wave shoulders with milgrain engraving	—
Finish · Occasion	High Polish · Engagement, Anniversary, Bridal	—

At a glance

A Dutch marquise lab grown diamond cathedral engagement ring from Signora Jewels.

A 1.00 ct reference center measuring approximately 10.50 × 5.40 mm, secured in a four-prong cathedral setting with no accent diamonds. Approx. 1.00 ct total.

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

Each metal color is shown in the photos. Choose your center weight and metal from the options on this page.

Signora Jewels built this ring around the long 10.50 × 5.40 mm outline of a Dutch marquise center. Four prongs hold the stone at its corners while cathedral shoulders rise from the shank to meet the setting, keeping the diamond clear of the engraved band.

The lower half measures about 2.10 mm wide and 1.80 mm thick. Across the shoulders, the metal opens into a repeating ocean-wave pattern edged with milgrain, so the detail reads from the side without crowding the diamond from above.

Design highlights

Dutch marquise center measuring approximately 10.50 × 5.40 mm at 1.00 ct
Customizable center weights from 1 to 4.5 ct
Four-prong cathedral setting with open side views
Ocean-wave shoulder pattern cut into both sides of the shank
Milgrain engraving tracing the raised band details
Made to order in 11 metal and color combinations

The wave pattern is the part you notice after the diamond. From the top, this reads as a clean solitaire; turn the hand and the engraved shoulders appear beneath the raised center. Browse more solitaire classics, compare styles in the engagement ring guide, or review color and wear differences in the metal guide.

Diamond & Ring Details

Specification	Details
Center stone	Dutch marquise · 10.50 × 5.40 mm · approx. 1.00 ct in the reference design
Accent stones	None
Total weight / count	approx. 1.00 ct · 1 stone in the reference design
Setting	Four-Prong Cathedral
Band details	Approx. 2.10 mm lower width · 1.80 mm lower thickness · 2.40 mm shoulder width
Setting height	Approx. 6.80 mm in the reference design
Center options	1, 1.5, 2, 2.5, 3, 3.5, 4 and 4.5 ct
Finish	High Polish with milgrain engraving

Measurements are approximate. The chosen center weight determines the final stone dimensions, setting proportions and total diamond weight.

About Lab Grown Diamonds

The Dutch marquise cut carries its length through a narrow 10.50 × 5.40 mm outline at the reference weight. Its broad center and tapered ends draw light along the stone rather than concentrating it in a round pattern. Each center is selected in F color and VS1 clarity.

Metal, Care & Fit

Yellow gold makes the milgrain and wave cuts easiest to read, while white gold and platinum keep the center and setting visually continuous. Rose gold adds contrast around the diamond. Clean beneath the raised center with warm water, mild soap and a soft brush, then check the four prongs after any hard impact.

FAQ

How high does the Dutch marquise center sit?
The reference setting is approximately 6.80 mm high. Cathedral shoulders support the raised head from both sides, leaving space beneath the diamond for cleaning and light.

Will the pointed ends of the center catch on clothing?
Four corner prongs secure the tapered ends of the Dutch marquise. The points remain more exposed than they would in a bezel, so avoid dragging the ring through knitted fabric.

Can this ring be worn beside a wedding band?
The cathedral shoulders rise toward the center while the lower shank remains about 2.10 mm wide. A straight band can sit alongside it, though the raised ocean-wave shoulders can leave a narrow visual gap near the setting.

What happens to the wave pattern with a larger center?
The ocean-wave and milgrain shank remain the defining band details. The center setting scales to hold the selected diamond weight while preserving the engraved shoulder treatment.

Which metal makes the milgrain easiest to see?
Yellow and rose gold create the strongest shadow around the milgrain edges. White gold and platinum give the ring a more continuous tone from the shank into the four-prong setting.

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