Portuguese Cut Lab Grown Diamond Split Shank Engagement Ring

IGI Report IncludedMade to OrderInsured Delivery

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$764.00

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

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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

Round Brilliant ·

Center

Round Brilliant

Metal

Customizable

Setting

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	Portuguese Cut · 6.15 mm diameter · approx. 1.00 ct
Accent diamonds	Round diamonds · approx. 0.06 ct total
Total diamond weight	approx. 1.06 ct
Stone type	Lab Grown Diamond
Setting	Four-Prong Split Shank with open botanical gallery
Finish · Occasion	High Polish · Engagement

Diamond details

Shape	Size	Weight (approx.)
Portuguese Cut	6.15 mm diameter	1.00 ct
Round Cut	Small shoulder accents	0.06 ct total
Total	—	1.06 ct

At a glance

A Portuguese cut lab grown diamond split shank engagement ring from Signora Jewels.

A 1.00 ct, 6.15 mm Portuguese cut center sits in a Four-Prong setting above round accents totaling approx. 0.06 ct. Approx. 1.06 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 6.15 mm Portuguese cut above shoulders shaped like overlapping leaves. The shank divides as it approaches the center, with small round diamonds tucked between the textured vine sections instead of running in a straight pavé row. See more engagement rings.

The Four-Prong basket rises approximately 6.0–6.5 mm and leaves the gallery open beneath the center. At the base, the band measures about 1.70 mm wide and 1.80 mm thick, while the botanical shoulders widen to roughly 4.5–5.5 mm beside the diamond.

Design highlights

1.00 ct Portuguese cut center, approx. 6.15 mm diameter
Round accent diamonds totaling approx. 0.06 ct
Four-Prong center setting
Split Shank with sculpted leaf-and-vine shoulders
Open botanical gallery beneath the center
Approx. 1.06 ct total diamond weight

The shoulder work gives the ring its character. Leaf-like metal sections overlap around the center while the small round accents add isolated flashes between them, leaving the Portuguese cut clearly separated from the decorative band.

About Lab Grown Diamonds

The Portuguese cut uses a dense facet pattern across a round outline, so the 6.15 mm center breaks light into many smaller reflections. Read more about diamond cuts and proportions in the diamond stone guide.

Metal, Care & Fit

White gold and platinum keep the prongs visually close to the center, while yellow and rose gold make the sculpted leaves easier to distinguish. Compare choices in the metal guide. Clean beneath the open gallery and between the leaf details with warm water, mild soap and a soft brush.

FAQ

What makes the Portuguese cut different on this ring?
The 6.15 mm center uses a denser facet arrangement than a standard round brilliant. That gives the face a busier pattern of small reflections while keeping a circular outline.

How much diamond weight is set into the shoulders?
The round shoulder accents total approximately 0.06 ct. They sit within the botanical metalwork rather than forming one continuous diamond row.

What does the Split Shank do for this design?
The upper band separates as it approaches the center, creating open space around the Four-Prong basket. That lets the leaf-and-vine structure frame the diamond without crowding it.

Will this ring stack with a wedding band?
The raised botanical gallery can leave a slight gap beside a straight band. A gently contoured band follows the center setting more closely.

How should the leaf-and-vine shoulders be cleaned?
Use a soft brush between the overlapping metal sections and underneath the center basket. Those recessed spaces collect more residue than the polished lower shank.

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