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Oval Cut Four-Prong Blue Halo Lab Grown Diamond Engagement Ring
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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
Oval Cut · Halo
Center
Oval Cut
Carat
1 ct
CustomizableMetal
CustomizableSetting
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.
Common questions
Ring questions, answered
Timing, shipping, certification and return eligibility for made-to-order rings.
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Answers last updated August 2, 2026
When will my order ship?
Standard listed pieces are made to order with an estimated dispatch of 7 business days. Use the product-page estimate when it is more specific and the timing confirmed after ordering. Delivery timing begins after dispatch and varies by destination and carrier service. Fully custom commissions follow the production schedule confirmed with their approved specifications or CAD.
When is insured worldwide delivery free?
Orders of US$500 or more receive free express, insured and tracked worldwide delivery. Below US$500, express, insured and tracked worldwide delivery is charged at the fixed rate shown at checkout.
Will I have to pay import duties?
For every destination available at checkout, Signora prepays applicable import duties and import taxes. Customers should not be asked to pay those import charges again on delivery.
What certificate comes with my jewelry?
Every finished piece includes a Signora Jewelry Certificate. Each selected individual lab-grown center or primary diamond of 0.50 ct or above includes an IGI grading report. Below 0.50 ct, IGI can be arranged by custom request. Custom moissanite and gemstone selections include GRA documentation, with the exact scope confirmed in the approved specifications. The product page or approved specifications state the exact laboratory, report type and scope.
Can I return a made-to-order listed design?
Standard listed products are eligible for return within 30 days after carrier-recorded delivery when unworn, unused and in their original condition, with the original packaging and included documents. Normal listed choices such as metal, stone carat, chain or bracelet length, an extended ring size, or complimentary engraving do not by themselves make an item Final Sale. A sale or discount also does not imply Final Sale; only an item explicitly classified as Final Sale follows the non-returnable exclusion.
How are fully custom orders handled?
A fully custom commission is different from a listed made-to-order design. After its specifications or CAD are approved, a normal change-of-mind return does not apply. Manufacturing defects remain reviewable. Signora may accept an exceptional non-defect return case by case; documented labor and genuinely non-recoverable costs may be deducted, but these deductions are not a restocking fee.