1.51 ct Emerald Laboratory-Grown Diamond

What reads well

• A 1.41:1 length-to-width ratio sits in the classic emerald cut range.
• Face-up spread (7.72 × 5.47 mm) is typical or better for a 1.51 ct emerald cut.
• Excellent polish and symmetry, the top finish grades.
• D color is in the colorless range.
• VS1 clarity is typically eye-clean in an emerald cut.

What deserves a closer look

• Very thick girdle: a thick girdle carries hidden weight and can reduce face-up size (thicker points are common in fancy shapes).
• Screening only: for this emerald cut, check images or video of the exact stone for the "hall of mirrors" step pattern, any see-through window under the table and clean corners.
• Treatment status is not stated on the report. For a laboratory-grown diamond, ask whether it is as-grown or post-growth treated.

The reading, field by field

Table · Closer look

A 70% table is larger than typical for an emerald cut (60–69%). Large tables can read bright but flatter, with less fire and contrast.

Total depth · Ideal

64% is within the typical 60–69% range for an emerald cut, keeping weight where it contributes to face-up size and light return.

Length-to-width · Ideal

A 1.41:1 outline is within the classic 1.3–1.5:1 range for an emerald cut.

Polish · Ideal

Excellent polish is the top finish grade — facets are cleanly executed with nothing that would soften sparkle.

Symmetry · Ideal

Excellent symmetry is the top finish grade — facets are cleanly executed with nothing that would soften sparkle.

Girdle · Closer look

Very thick: a thick girdle carries weight in the rim, so the stone can face up a little smaller for its carat weight. It is durable, though.

Culet · Ideal

Long: a keel-line culet, normal for elongated step and modified cuts.

Color · Ideal

D is in the colorless range and faces up white in any metal.

Clarity · Favorable

VS1 is typically eye-clean, though step cuts show inclusions more readily — worth a close look at the images.

Fluorescence · Ideal

None: no meaningful effect on appearance.

What to check on the exact stone

• Can you see straight through the center (windowing), or does it reflect clean steps?
• With open step facets, is the center completely eye-clean without any visible dark marks?
• Is extra carat weight trapped in the thick girdle rim where it does not add finger presence?
• Can you show me the inscribed report number under a loupe before it is set?

Report facts

Origin

Laboratory-grown

Carat

1.51 ct

Shape

Emerald

Cut grade

Not given for this shape

Color

D

Clarity

VS1

Measurements

7.72 × 5.47 × 3.50 mm

Table

70%

Total depth

64%

Crown angle

Not given for this shape

Pavilion angle

Not given for this shape

Polish

Excellent

Symmetry

Excellent

Girdle

Very thick

Culet

Long

Fluorescence

None