The Carat Standard

IGI report LG824601458

3.00 ct Marquise Laboratory-Grown Diamond

90/100 · Refined

A strong candidate on paper; confirm its light pattern in imagery.

What reads well

  • A 2.03:1 length-to-width ratio sits in the classic marquise range.
  • Face-up spread (14.79 × 7.30 mm) is typical or better for a 3.00 ct marquise.
  • Table 61% and depth 63.2% fall in the typical marquise range.
  • Excellent polish and symmetry, the top finish grades.
  • D 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.

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
3.00 ct
Shape
Marquise
Color
D
Clarity
VVS1
Cut
Not stated
Measurements
14.79 × 7.30 × 4.61 mm
Table
61%
Depth
63.2%
Crown angle
Not stated
Pavilion angle
Not stated
Girdle
Slightly thick to thick (faceted)
Culet
Pointed
Polish
Excellent
Symmetry
Excellent
Fluorescence
None

How The Carat Standard reads a report