The Carat Standard

IGI report LG756527774

2.55 ct Round Brilliant Laboratory-Grown Diamond

84/100 · Refined

A strong, composed candidate on paper.

What reads well

  • Excellent polish and symmetry, the top finish grades.
  • D color is in the colorless range.
  • VVS2 clarity: inclusions are not a practical visual factor.
  • No fluorescence: no haze risk to weigh.
  • Medium to slightly thick girdle balances durability and weight retention.

What deserves a closer look

  • Crown 34° / pavilion 41.7° fall outside the pairing zone associated with strong light return.
  • Table 63% sits outside the preferred round range.
  • Treatment status is not stated on the report. For a laboratory-grown diamond, ask whether it is as-grown or post-growth treated.
  • Not stated on the report: cut grade. This is not assumed to be favorable, and confidence is lower.

The reading, field by field

Table · Closer look
A 63% table is larger than typical for a round brilliant (53–59%). Large tables can read bright but flatter, with less fire and contrast.
Total depth · Closer look
59.3% is shallower than typical for a round brilliant (59.5–63%). That spreads the stone face-up but raises the risk of windowing — a glassy, see-through center.
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
D 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

  • With a shallow 59.3% depth, can you see a glassy, see-through patch in the center?
  • Does the large table look bright but flat, with less colored fire than you expected?
  • 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
2.55 ct
Shape
Round Brilliant
Cut grade
Not stated
Color
D
Clarity
VVS2
Measurements
8.77–8.79 × 5.20 mm
Table
63%
Total depth
59.3%
Crown angle
Not stated
Pavilion angle
Not stated
Polish
Excellent
Symmetry
Excellent
Girdle
Medium to slightly thick (faceted)
Culet
Pointed
Fluorescence
None

About The Carat Standard Score

How The Carat Standard reads a report