The Carat Standard

IGI report LG772674202

12.05 ct Oval Laboratory-Grown Diamond

78/100 · Considered

A balanced profile with a few questions to carry forward.

What reads well

  • Face-up spread (20.60 × 12.68 mm) is typical or better for a 12.05 ct oval.
  • Excellent polish and symmetry, the top finish grades.
  • F color is in the colorless range.
  • VVS2 clarity: inclusions are not a practical visual factor.
  • No fluorescence: no haze risk to weigh.

What deserves a closer look

  • A 1.62:1 length-to-width ratio is outside the classic oval range; the outline will look more elongated than typical.
  • The table 65% sits outside the typical oval range.
  • A 54.5% depth is shallow for an oval; check images for a see-through window in the centre.
  • 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.

The reading, field by field

Table · Closer look
A 65% table is larger than typical for an oval (53–63%). Large tables can read bright but flatter, with less fire and contrast.
Total depth · Closer look
54.5% is shallower than typical for an oval (58–63.5%). That spreads the stone face-up but raises the risk of windowing — a glassy, see-through center.
Length-to-width · Favorable
A 1.62:1 outline is longer and slimmer than the classic 1.3–1.5:1 range for an oval — a matter of taste, but worth seeing in person.
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
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

  • With a shallow 54.5% 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?
  • In a face-up video, does the bow-tie flicker as the stone tilts, or stay a fixed dark band across the center?
  • Can you show me the inscribed report number under a loupe before it is set?

Report facts

Origin
Laboratory-grown
Carat
12.05 ct
Shape
Oval
Cut grade
Not given for this shape
Color
F
Clarity
VVS2
Measurements
20.60 × 12.68 × 6.91 mm
Table
65%
Total depth
54.5%
Crown angle
Not given for this shape
Pavilion angle
Not given for this shape
Polish
Excellent
Symmetry
Excellent
Girdle
Slightly thick (faceted)
Culet
Pointed
Fluorescence
None

About The Carat Standard Score

How The Carat Standard reads a report