The Cut Guide  ·  Reference Fancy Shape  ·  Step Cut Family

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Cut Reference  ·  No. 004

Emerald
Cut

Step Cut  ·  57–58 Facets  ·  Rectangular

The most unforgiving cut in the collection. No faceting structure to hide inclusions — just clean geometry and the truth about your stone.

The emerald cut is a rectangular step cut with truncated corners and large, parallel facets arranged in concentric steps rather than radiating from a point. Where brilliant cuts scatter light into thousands of tiny flashes, the emerald produces a distinct hall-of-mirrors effect — deep, slow flashes of light and dark that move as the stone rotates. It is architectural, restrained, and completely transparent to inclusions. The clarity requirement here is not a preference; it is a structural reality of the cut's geometry.

Origin

The step-cut technique predates the brilliant by centuries, originally developed to cut naturally occurring emerald crystals without the wastage a brilliant facet pattern would create. The rectangular step cut was adapted for diamonds in the Art Deco period of the 1920s, when its clean lines aligned perfectly with the movement's geometric aesthetic. The octagonal outline — created by truncating the four corners — reduces the risk of chipping that sharp corners would present, while producing the characteristic stepped silhouette that defines the cut today.

On The Hand
Elongating
The rectangular outline creates a strong elongating effect on shorter fingers. Standard L:W ratios of 1.30–1.50 read as distinctly long — wider ratios (1.20–1.30) are more balanced. The truncated corners eliminate chipping risk that sharp corners carry.
VS2+
Min. Clarity
1.30–1.50
Ideal L:W Ratio
−20%
vs. Round
1920s
Art Deco Era
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Emerald Cut thecutguide.com
Specifications
Table Percentage
60 – 70%
Larger tables are a defining feature of the step cut — don't penalize a stone for a 68% table here the way you would on a round.
Depth Percentage
58 – 68%
Stay between 60–66% for the best balance of face-up size and depth of refraction.
Length-to-Width Ratio
1.30 – 1.50
1.30–1.40 for a balanced rectangle. 1.45–1.50 for the classic Art Deco elongated look. Below 1.20 is effectively an Asscher.
GIA Cut Grade
—
Fancy Shape
Rely on polish, symmetry, and proportion data. Clarity grade matters far more here than on brilliant cuts — step up at least one clarity grade from what you'd buy in a round.
Polish / Symmetry
Exc / Exc
Non-negotiable on a step cut. Asymmetric steps or surface roughness are plainly visible in this facet arrangement.
Light Performance
Brilliance68
Fire78
Scintillation62
Size per Carat90
Clarity Concealment38

The low clarity concealment score is not a flaw — it is the nature of the step cut. Budget accordingly: spend less on cut, more on clarity.

Budget
vs. Round Brilliant
−15 to −25%
The price discount is real — but budget the savings toward clarity. A VS1 emerald costs less than a VS2 round of equal face-up size.
Lab-Grown Emerald
−40 to −60%
Lab-grown stones often show fewer inclusions at equivalent clarity grades. This shape benefits more from lab-grown than almost any other.
What Retailers Won't Tell You
⚠ SI1 Is Not Acceptable Here
SI1 inclusions that are invisible to the naked eye in a round brilliant are often clearly visible in an emerald cut of the same grade. The step-cut's open facets act as a magnifying lens. VS2 is the floor; VS1 or better is strongly recommended above 1.5 carats. Never buy an emerald cut on clarity grade alone — request the GIA plot and check inclusion position.
⚠ Color Shows More Clearly
The large open table of a step cut shows body color more readily than a brilliant's sparkle-heavy surface. Buyers who buy H or I color in a round should consider G or better in an emerald cut — particularly in yellow gold settings, which amplify color. The shape rewards high color investment more directly than any brilliant cut.
The Cut Guide  ·  Assessment  ·  Emerald Cut
"A cut for buyers who want clarity over spectacle — literally. The hall-of-mirrors effect is unlike anything a brilliant cut produces, and the elongated geometry reads as sophisticated in a way that rounds and cushions do not. The price is a mandatory upgrade in clarity and color that often eliminates the apparent discount. Go in knowing that, and the emerald cut rewards you with something no other shape can offer."
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