Coffin Cut Lab Grown Diamond Vintage Engagement Ring

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. IGI certified.

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

Free insured express shipping over $500, duties prepaid to the US, UK and Canada, with a 30-day return policy.

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

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.