Coffin Cut Lab Grown Diamond Vintage Engagement Ring

IGI Report IncludedMade to OrderInsured Delivery

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$927.00

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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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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

Cut · Halo

Center

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	Coffin Cut · 11.20 × 6.80 mm · Approx. 2.00 ct	1 ct, 1.5 ct, 2 ct, 2.5 ct, 3 ct, 3.5 ct, 4 ct, 4.5 ct
Cluster Diamonds	20 Round Brilliant + 6 Marquise · Approx. 0.26 ct	Scaled to suit the selected center size
Total Diamond Weight	Approx. 2.26 ct	Varies with selected center size
Stone Type	Lab Grown Diamond	—
Setting	Four-Prong Cathedral Basket with Half Halo & Marquise Cluster	—
Finish · Occasion	High Polish · Engagement, Anniversary, Bridal	—

At a glance

A coffin cut lab grown diamond vintage engagement ring from Signora Jewels.

The ring shown features an 11.20 × 6.80 mm coffin cut lab grown diamond weighing approximately 2.00 ct. Twenty round brilliant diamonds and six marquise diamonds create a decorative half halo totaling approximately 0.26 ct.

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

Select your preferred center diamond size and precious metal using the options on this page.

The coffin cut center is held in a four-prong cathedral basket that leaves the dramatic silhouette fully visible while allowing light to enter through the open gallery beneath. The elongated shape and angular outline give the ring a bold vintage character unlike traditional diamond cuts.

A decorative half halo rises above the center with marquise and round brilliant diamonds arranged in a crown-like cluster. The marquise accents introduce graceful points while the round diamonds soften the outline, creating a balanced contrast that frames the center without covering it. Signora Jewels crafts every ring to order in your selected precious metal and center diamond size.

Design Highlights

Customizable coffin cut lab grown diamond from 1 ct to 4.5 ct
Four-prong cathedral basket
Vintage-inspired half halo design
Six marquise accent diamonds
Twenty round brilliant accent diamonds
High polish finish

Browse more Vintage Engagement Rings, explore our Engagement Ring Guide, or compare precious metals using our Metal Guide.

Diamond & Ring Details

Specification	Details
Center Diamond	Coffin Cut · 11.20 × 6.80 mm · Approx. 2.00 ct (shown)
Round Accent Diamonds	20 Stones · Approx. 0.11 ct
Marquise Accent Diamonds	6 Stones · Approx. 0.15 ct
Total Stones	27
Total Diamond Weight	Approx. 2.26 ct
Center Diamond Options	1 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 coffin cut combines elongated geometry with bold angular edges for a distinctive vintage-inspired appearance. The decorative marquise and round diamond cluster creates a crown-like frame that highlights the unique outline while preserving the center as the focal point.

Metal, Care & Fit

Available in Silver, 9K, 14K and 18K Yellow, White and Rose Gold, plus Platinum. Clean beneath the cathedral basket and around the marquise cluster using warm water, mild soap and a soft brush to maintain brilliance and keep the detailed setting free from residue.

FAQ

What makes a coffin cut different from other diamond shapes?
The coffin cut features tapered sides and angular ends, creating a bold geometric outline with a distinctive vintage-inspired appearance.

Can I choose a different center diamond size?
Yes. This design is available with center diamond options from 1 ct through 4.5 ct while maintaining the same vintage-inspired styling.

Why are marquise diamonds used in the half halo?
Their elongated points create a crown-like frame around the center, adding height and contrast without covering the coffin cut outline.

Is the cathedral basket suitable for everyday wear?
Yes. The cathedral shoulders reinforce the basket while the polished comfort shank provides a balanced fit for daily wear.

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