3.00 ct Marquise Laboratory-Grown Diamond

What reads well

• A 1.86:1 length-to-width ratio sits in the classic marquise range.
• Face-up spread (14.03 × 7.56 mm) is typical or better for a 3.00 ct marquise.
• Table 61% and depth 63.6% fall in the typical marquise range.
• Excellent polish and symmetry, the top finish grades.
• E color is in the colorless range.

What deserves a closer look

• Thick to 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 marquise, check images or video of the exact stone for the bow-tie and whether the two points line up end to end.
• 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 · Ideal

At 61%, the table sits within the typical 53–63% range for a marquise, balancing brightness with fire.

Total depth · Ideal

63.6% is within the typical 58–64% range for a marquise, keeping weight where it contributes to face-up size and light return.

Length-to-width · Ideal

A 1.86:1 outline is within the classic 1.85–2.2:1 range for a marquise.

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

Thick to very thick (faceted): 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

Pointed: no visible culet facet when viewed face-up.

Color · Ideal

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

Clarity · Ideal

VVS2: inclusions, if any, are only visible under magnification.

Fluorescence · Ideal

None: no meaningful effect on appearance.

What to check on the exact stone

• In a face-up video, does the bow-tie flicker as the stone tilts, or stay a fixed dark band across the center?
• Will the ring setting use protective V-tip prongs or a bezel to safeguard the two delicate points?
• 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

3.00 ct

Shape

Marquise

Cut grade

Not given for this shape

Color

E

Clarity

VVS2

Measurements

14.03 × 7.56 × 4.81 mm

Table

61%

Total depth

63.6%

Crown angle

Not given for this shape

Pavilion angle

Not given for this shape

Polish

Excellent

Symmetry

Excellent

Girdle

Thick to very thick (faceted)

Culet

Pointed

Fluorescence

None