Marquise Cut Lab Grown Diamond Three-Stone Engagement Ring

IGI Report IncludedMade to OrderInsured Delivery

1 of 8

$735.00

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

Understand your certificates →Certificate details →

Metal:

Choose your fit

Ring size Choose one

Forever, A & J

Live preview

Engraving 0 / 20

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

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	Details
Center diamond	Marquise Cut · 10.60 × 5.17 mm · approx. 1.00 ct
Side diamonds	2 pear cut diamonds · approx. 0.09 ct total
Total diamond weight	approx. 1.09 ct · 3 diamonds
Stone type	Lab Grown Diamond
Setting	Three-Stone with prong-set marquise center and pear side diamonds
Finish · Occasion	High Polish · Engagement

At a glance

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

A 1.00 ct, 10.60 × 5.17 mm marquise center is flanked by 2 pear diamonds totaling approx. 0.09 ct. Approx. 1.09 ct total.

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

Choose your metal in the options on this page.

Signora Jewels sets the 10.60 × 5.17 mm marquise between two pear side diamonds, creating a clean three-stone ring without pavé or extra shoulder stones. The pears point inward toward the center, carrying the eye into the long marquise while the polished shank stays quiet behind them.

The setting sits approximately 5.5–6.0 mm high. At the base, the band measures about 1.80 mm wide and 1.40 mm thick, keeping the lower shank light while the three diamonds provide the width across the top.

Design highlights

1.00 ct marquise center, approx. 10.60 × 5.17 mm
2 pear cut side diamonds totaling approx. 0.09 ct
Three-Stone arrangement with tapered shoulders
Prong-set center and side stones
Compact open setting beneath the center
Approx. 1.09 ct total diamond weight

The pear side stones do most of the visual work after the center. Their pointed ends meet the marquise while their rounded ends taper into the shank, so the transition from the 1.00 ct center to the polished band feels deliberate rather than abrupt.

About Lab Grown Diamonds

The marquise center spreads its weight along the finger, while the smaller pear side stones repeat its pointed geometry at a softer scale. Read more about elongated cuts and proportions 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 pear side stones. Compare choices in the metal guide. Clean beneath the center and around both pear settings with warm water, mild soap and a soft brush.

FAQ

What makes this a true three-stone design?
The ring uses one marquise center with one pear diamond on each side. There are no additional pavé stones competing with the three principal diamonds.

How much diamond weight is in the pear side stones?
The two pear side diamonds total approximately 0.09 ct. Together with the 1.00 ct center, the ring carries approximately 1.09 ct total diamond weight.

How does the marquise center wear on the finger?
The 10.60 × 5.17 mm marquise creates a pronounced north-to-south line. Its long outline gives the ring more visual length than a round center of similar weight.

Will this design work with a wedding band?
The compact three-stone setting keeps most of the shoulder area clear, though a straight band can leave a small gap beside the center structure. A gently contoured band follows it more closely.

How should the pear side stones be cleaned?
Use a soft brush around the pointed ends of both pears and underneath the center setting. Those narrow junctions collect more residue than the polished lower shank.

Your cart is empty