The Carat Standard

IGI report LG779608550

3.54 ct Oval Laboratory-Grown Diamond

89/100 · Refined

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

What reads well

  • A 1.50:1 length-to-width ratio sits in the classic oval range.
  • Face-up spread (12.54 × 8.37 mm) is typical or better for a 3.54 ct oval.
  • Excellent polish and symmetry, the top finish grades.
  • D color is in the colorless range.
  • VS1 clarity is typically eye-clean in an oval.

What deserves a closer look

  • Slightly 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 oval, check images or video of the exact stone for the bow-tie (a dark band across the centre) and whether both ends look even.
  • 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

  • Does the large table look bright but flat, with less colored fire than you expected?
  • In a face-up video, does the bow-tie flicker as the stone tilts, or stay a fixed dark band across the center?
  • 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
3.54 ct
Shape
Oval
Color
D
Clarity
VS1
Cut
Not stated
Measurements
12.54 × 8.37 × 5.14 mm
Table
64%
Depth
61.4%
Crown angle
Not stated
Pavilion angle
Not stated
Girdle
Slightly thick to very thick (faceted)
Culet
Pointed
Polish
Excellent
Symmetry
Excellent
Fluorescence
None

How The Carat Standard reads a report