Oval Cut Four-Prong Blue Halo Lab Grown Diamond Engagement Ring

IGI Report IncludedMade to OrderInsured Delivery

Oval Blue Lab Grown Diamond Halo Engagement Ring in White Gold with Split Cathedral Pavé Shank

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$947.00

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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

Oval Cut · Halo

Center

Oval Cut

Carat

1 ct

Customizable

Metal

Customizable

Setting

Halo

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	Oval Brilliant · 8.80 × 6.40 mm · Approx. 1.31 ct	1 ct, 1.31 ct, 1.5 ct, 2 ct, 2.5 ct, 3 ct, 3.5 ct, 4 ct, 4.5 ct
Halo Diamonds	20 Round Brilliant · Approx. 0.18 ct	Scales with center size
Split Shank Diamonds	36 Round Brilliant · Approx. 0.26 ct	Scales proportionally
Total Diamond Weight	Approx. 1.75 ct	Varies with selected center size
Stone Type	Lab Grown Diamond	—
Setting	Four-Prong Oval Halo with Split Cathedral Pavé Shank	—
Finish · Occasion	High Polish · Engagement, Anniversary, Bridal	—

At a glance

An oval lab grown diamond halo engagement ring from Signora Jewels.

An 8.80 × 6.40 mm oval blue lab grown diamond is secured by a four-prong setting and surrounded by a halo of 20 round diamonds. Thirty-six additional pavé diamonds continue across the split cathedral shank for approximately 0.44 ct of accent diamonds.

Made to order in 11 metals: Silver, 9K, 14K and 18K Yellow, White and Rose Gold, plus Platinum.

Each metal color is shown in the photos. Select your preferred center diamond weight and precious metal from the options on this page.

The elongated oval center sits inside an open basket that allows light to reach the diamond from below while the four-prong setting keeps the outline clean and balanced. Signora Jewels builds each ring to order, so every version is crafted specifically for your selected diamond size and metal.

The split cathedral shoulders rise toward the halo before flowing into the basket, creating support beneath the center while keeping the profile open. Fifty-six round accent diamonds frame the center and continue across both shoulders, giving the ring sparkle from every viewing angle.

Design Highlights

Customizable oval lab grown diamond from 1 ct to 4.5 ct
Four-prong oval halo setting
Twenty round halo diamonds
Split cathedral pavé shank with thirty-six accent diamonds
Open basket gallery for improved light entry
High polish finish

Browse more Halo Engagement Rings, learn about choosing the perfect center stone in our Engagement Ring Guide, or compare precious metals using our Metal Guide.

Diamond & Ring Details

Specification	Details
Center Diamond	Oval Brilliant · 8.80 × 6.40 mm · Approx. 1.31 ct (shown)
Halo	20 Round Brilliant Diamonds · Approx. 0.18 ct
Split Shank	36 Round Brilliant Diamonds · Approx. 0.26 ct
Total Stones	57
Total Diamond Weight	Approx. 1.75 ct
Center Diamond Options	1 ct, 1.31 ct, 1.5 ct, 2 ct, 2.5 ct, 3 ct, 3.5 ct, 4 ct and 4.5 ct
Finish	High Polish

Measurements are approximate. Final dimensions vary according to the selected center diamond size.

About Lab Grown Diamonds

The oval brilliant cut combines long, elegant proportions with broad flashes of light across the crown. The surrounding halo increases the visual size of the center stone while preserving the graceful outline of the oval shape.

Metal, Care & Fit

Available in Silver, 9K, 14K and 18K Yellow, White and Rose Gold, plus Platinum. Clean the halo and pavé diamonds regularly with warm water, mild soap and a soft brush to keep the small accent stones bright. The open basket also makes cleaning beneath the center diamond easier.

FAQ

Does the halo make the oval center appear larger?
Yes. The halo surrounds the oval with closely matched round diamonds, increasing the overall face-up appearance without changing the elegant proportions.

Why is the split cathedral shank used on this design?
The split cathedral shoulders support the center setting from beneath while keeping the gallery open and balanced.

Can I choose a larger center diamond?
Yes. This design is available with multiple center diamond sizes from 1 ct through 4.5 ct while maintaining the same overall style.

Which metal color best complements the blue center diamond?
White Gold and Platinum emphasize the cool blue tone, while Yellow and Rose Gold create stronger contrast that makes the center diamond stand out.

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