IGI report LG787653197
4.01 ct Marquise Laboratory-Grown Diamond
90/100 · Refined
A strong candidate on paper; confirm its light pattern in imagery.
What reads well
- A 1.98:1 length-to-width ratio sits in the classic marquise range.
- Face-up spread (16.44 × 8.29 mm) is typical or better for a 4.01 ct marquise.
- Table 61% and depth 60.2% fall in the typical marquise range.
- Excellent polish and symmetry, the top finish grades.
- F color is in the colorless range.
What deserves a closer look
- 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
- 60.2% 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 1.98:1 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 · Ideal
- Medium To Slightly Thick (Faceted): a durable girdle thickness that doesn't hide meaningful weight.
- Culet · Ideal
- Pointed: no visible culet facet when viewed face-up.
- Color · Ideal
- F 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?
- Does this CVD diamond show any brown or gray undertone face-up in daylight?
- Can you show me the inscribed report number under a loupe before it is set?
Report facts
- Origin
- Laboratory-grown
- Carat
- 4.01 ct
- Shape
- Marquise
- Color
- F
- Clarity
- VVS2
- Cut
- Not stated
- Measurements
- 16.44 × 8.29 × 4.99 mm
- Table
- 61%
- Depth
- 60.2%
- Crown angle
- Not stated
- Pavilion angle
- Not stated
- Girdle
- Medium to slightly thick (faceted)
- Culet
- Pointed
- Polish
- Excellent
- Symmetry
- Excellent
- Fluorescence
- None