Round Lab Grown Diamond Open-Shank Anniversary Ring

IGI Report IncludedMade to OrderInsured Delivery

round open-shank diamond ring in yellow gold

1 of 12

$914.00

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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.

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

Round Brilliant · Solitaire

Center

Round Brilliant

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
Ring style	Wide open-shank anniversary ring	Included as shown
Center diamond	Round · Approx. 7.40 mm · 1.50 ct	Yes · 1.00–4.50 ct
Total diamond weight	Approx. 1.50 ct	Changes with the selected center weight
Setting	Low open-sided collet between raised shoulders	Scaled to the selected diamond
Band width	Approx. 7.40 mm at the front	Proportions scale with the center
Band width at base	Approx. 3.58 mm	Included as shown
Stone type	Lab Grown Diamond	Lab Grown Diamond
Metal	Rose gold shown	11 metal and color options
Reference size	US 8	Choose your required ring size
Finish	High Polish	Included

At a glance

A round Lab Grown Diamond open-shank anniversary ring from Signora Jewels.

The reference design holds an IGI-certified 1.50 ct round center measuring Approx. 7.40 mm in a low open-sided collet.

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

Made to order in your selected center weight, metal and ring size. Check your fit with the ring size guide.

Signora Jewels places the round diamond inside a clean break between two broad shoulders. The 7.40 mm center sits close to the finger, with its upper half exposed so light reaches the crown without a ring of raised prongs around it.

The front carries the full width of the diamond, then narrows to Approx. 3.58 mm beneath the finger. Flat polished sides give the ring a steady feel, while the open shank keeps the center visible from the front and profile. Compare gold and platinum choices in the metal guide, or request altered proportions through our custom jewelry service.

Design highlights

Round Lab Grown Diamond center
1.50 ct reference center measuring Approx. 7.40 mm
Customizable center from 1.00 to 4.50 ct
Open-shank construction with broad polished shoulders
Low open-sided collet setting
Approx. 7.40 mm front width
Approx. 3.58 mm width at the base
Reference size US 8

The shoulders stop just short of the diamond instead of wrapping around it. That gap separates the stone from the metal and lets its round outline remain clear against the wide band.

Diamond & Ring Details

Specification	Details
Center shape	Round
Reference center	1.50 ct · Approx. 7.40 mm
Available center weights	1.00, 1.50, 2.00, 2.50, 3.00, 3.50, 4.00 and 4.50 ct
Setting	Open-sided collet between raised shoulders
Reference size	US 8
Finish	High Polish

The setting and metal weight scale with the selected center diamond.

About Lab Grown Diamonds

A round brilliant returns tight flashes across its circular face. Lab grown diamonds have the same carbon crystal structure, hardness and optical properties as mined diamonds and are assessed using the same grading standards.

Metal, Care & Fit

Choose silver, 9K, 14K or 18K gold in yellow, white or rose, or platinum. The wide front needs a close fit so the diamond remains centered on the finger. Clean around the open collet with warm water, mild soap and a soft brush, then rinse and dry fully.

FAQ

Can I choose another center diamond size?
Yes. The round center is available from 1.00 to 4.50 ct, and the setting scales with the selected weight.

What size diamond is shown?
The reference ring holds a 1.50 ct round Lab Grown Diamond measuring Approx. 7.40 mm.

Are there any accent diamonds?
No. This design contains one round center diamond and no pavé, halo or side stones.

How is the center diamond held?
The diamond sits in a low open-sided collet between two raised shoulders. The setting leaves much of the round outline visible.

How does this setting compare with a prong setting?
This open-sided collet sits lower and exposes fewer projecting metal points than a traditional four-prong setting.

What is the difference between 9K and 18K gold?
9K gold contains more strengthening alloy and resists surface wear, while 18K gold contains more pure gold and carries richer color.

Is this ring designed for men?
Yes. The broad shoulders, 7.40 mm front width and plain polished surface give this Signora Jewels ring the proportions of a men’s anniversary or engagement ring.

Can the ring be resized?
Yes. Most gold and platinum versions can be resized by a qualified jeweler, though the open-shank structure should be checked before alteration.

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