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Emerald Cut Diamond

The emerald cut is one of the most elegant and sophisticated diamond shapes, known for its clean lines, geometric appeal, and a distinctive "hall of mirrors" effect created by its step-cut faceting. Unlike brilliant cuts that prioritise sparkle, the emerald cut emphasises clarity and lustre.

Quick Facts

Facets

57 facets in a step-cut pattern with cropped corners

Length-to-Width Ratio

1.30 to 1.60 is the standard range. 1.40 to 1.55 is most popular. Lower ratios appear more square (approaching Asscher cut), while higher ratios create a more elongated rectangle.

Brilliance

Moderate — the emerald cut produces broad, dramatic light flashes rather than intense sparkle. Its beauty comes from lustre, clarity, and the interplay of light and dark planes.

Best For

Buyers who appreciate understated elegance over maximum sparkle, vintage-inspired designs, and those who want a shape that highlights diamond clarity.

What is a Emerald Cut Diamond?

The emerald cut is a step-cut diamond shape with a rectangular outline and cropped corners. Instead of the triangular and kite-shaped facets found in brilliant cuts, the emerald cut features long, parallel facets arranged in a staircase pattern. This creates broad, dramatic flashes of light rather than the fiery sparkle of a brilliant cut. The emerald cut typically has 57 facets and is defined by its open, transparent appearance that draws the eye deep into the stone. The name comes from the technique originally developed for cutting emerald gemstones, where the stepped facets helped protect the brittle stone from mechanical stress.

History

Step cutting dates back to the 1500s and was first used on emerald gemstones to reduce the pressure during cutting that could fracture the brittle stone. The technique was adapted for diamonds and became popular in the Art Deco era of the 1920s and 1930s, when geometric shapes and clean lines dominated design. The emerald cut perfectly embodied the Art Deco aesthetic and has remained a symbol of refined taste ever since. It has been the choice of notable engagement rings, including Beyoncé's reportedly 18-carat emerald cut and Amal Clooney's 7-carat ethically sourced stone.

Pros & Cons

Pros

Sophisticated, understated elegance that never goes out of style
Appears larger than many shapes at the same carat weight due to its shallow depth and wide table
Typically 20-30% less expensive than equivalent round brilliants
The open facets create a distinctive hall of mirrors effect that is mesmerising
Perfect for vintage and Art Deco inspired settings

Cons

The open, transparent faceting shows inclusions and colour more readily than brilliant cuts
Requires higher clarity grades (VS2 or better) for an eye-clean appearance
Less sparkle than brilliant-cut shapes — beauty comes from lustre and flash, not fire
Colour is more visible, so a higher colour grade (G or better) is recommended

Buying Tips

Because the emerald cut's open facets act like windows into the stone, clarity is more important here than with any other shape. Aim for VS2 or better for an eye-clean stone, and prioritise a higher colour grade (G or above). Look for excellent symmetry and polish. The table percentage should be between 61-69% for the best light performance. Lab-grown emerald cuts offer an excellent opportunity to achieve high clarity at a more accessible price.

Recommended Settings

The emerald cut shines in clean, architectural settings. A solitaire with a thin, plain band lets the geometric beauty speak for itself. Three-stone settings with tapered baguette side stones are a classic Art Deco pairing. East-west settings, where the diamond sits horizontally, create a bold, modern statement. A bezel setting frames the shape perfectly and provides practical protection for the corners.

The emerald cut appeals to buyers with refined, minimalist taste who prefer elegance over sparkle. It is a favourite among architecture and design enthusiasts and those drawn to Art Deco aesthetics. It suits confident personalities who appreciate understated luxury.