Round Cut Lab Grown Diamond Three-Stone Engagement Ring

IGI Report IncludedMade to OrderInsured Delivery

1 of 9

$688.00

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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. 0.8 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.

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 · Three Stone

Center

Round Brilliant

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	Round Brilliant Cut · approx. 5.9–6.0 mm diameter · 0.80 ct
Side diamonds	2 Tapered Baguette Cut · approx. 0.31–0.32 ct each · 0.63 ct combined
Total diamond weight	Approx. 1.43 ct · 3 diamonds
Stone type	Lab Grown Diamond
Setting	Three-Stone with Four-Prong round center and separately secured tapered baguette side diamonds
Band	Plain polished shank · approx. 1.70 mm wide and 1.50 mm thick at base
Shoulder width	Approx. 3.0–3.5 mm through side-stone section
Setting height	Approx. 5.8–6.3 mm
Finish · Occasion	High Polish · Engagement

Diamond details

Shape	Size	Qty	Weight (approx.)
Round Brilliant center	5.9–6.0 mm diameter	1	0.80 ct
Tapered Baguette side diamonds	Individual dimensions not supplied	2	0.63 ct combined
Total	—	3	1.43 ct

At a glance

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

One 0.80 ct round brilliant, approximately 5.9–6.0 mm across, with two tapered baguette diamonds totaling 0.63 ct.

Three diamonds with approximately 1.43 ct combined weight; four-prong center and plain polished shank.

Made to order in 10K, 14K and 18K yellow, white and rose gold.

Signora Jewels places a round brilliant between two tapered baguette diamonds, each set with its wider end facing the center. Four polished prongs hold the round diamond while the stepped facets of the baguettes draw the eye outward toward the band.

The center measures approximately 5.9–6.0 mm and weighs 0.80 ct. The two side diamonds contribute another 0.63 ct, giving this three-stone ring a combined diamond weight of 1.43 ct.

Design highlights

0.80 ct round brilliant center measuring approximately 5.9–6.0 mm
Two tapered baguette side diamonds totaling 0.63 ct
Four rounded prongs securing the center diamond
Step-cut side facets contrasting with the round brilliant center
Open spaces around the individually secured side diamonds
Plain polished lower shank measuring approximately 1.70 mm wide

There are no small diamonds along the band. The two baguettes provide all the side detail, tapering into the narrow shoulders without interrupting the polished metal underneath the finger.

About Lab Grown Diamonds

The round brilliant center produces closely spaced reflections, while the baguettes show longer, straighter facet patterns. Our diamond stone guide explains the differences between brilliant and step cuts.

Metal, Care & Fit

Choose 10K, 14K or 18K yellow, white or rose gold. The raised three-stone head needs clearance beside a wedding band. Clean carefully around the baguette corners and center prongs, following our jewelry care guide.

FAQ

Why are tapered baguettes used beside the round center?
The two tapered baguettes have wider inner ends beside the round diamond and narrower outer ends toward the shoulders. Their straight step facets contrast with the center's brilliant-cut facets.

How much diamond weight comes from the side stones?
The two tapered baguettes weigh approximately 0.63 ct combined, or approximately 0.31–0.32 ct each. With the 0.80 ct center, the ring totals approximately 1.43 ct.

Does this ring have pavé diamonds or a halo?
No. The design contains exactly three diamonds: one round brilliant center and two tapered baguettes. The remaining band is plain polished metal.

Will a straight wedding band sit flush against this ring?
The setting height is estimated at 5.8–6.3 mm, with the side-stone section measuring approximately 3.0–3.5 mm wide. A flush fit depends on clearance beneath the completed settings, so compare both rings together.

How should I clean the tapered baguette settings?
Use warm water, mild soap and a soft brush around the baguette corners and four center prongs. Rinse thoroughly and pat dry, avoiding fabric snagging beneath the metal contacts.

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