IGI report LG766625812

1.00 ct Round Brilliant Laboratory-Grown Diamond

79/100 · Considered

A balanced profile with a few questions to carry forward.

What reads well

Crown 34.2° / pavilion 39.9° 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.

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: 59.1% 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.
Crown angle · Ideal: 34.2° sits in the 32–36° zone where crown angles typically balance fire and brightness.
Pavilion angle · Closer look: 39.9° is shallower than the narrow 40.5–41.3° zone. Shallow pavilions can let light pass straight through, looking glassy.
Polish · Favorable: Very Good polish is a fine result; the difference from Excellent is rarely visible without magnification.
Symmetry · Favorable: Very Good symmetry is a fine result; the difference from Excellent is rarely visible without magnification.
Girdle · Favorable: Slightly thick to thick (faceted): durable, on the thicker side for a round brilliant, so a little weight sits in the rim.
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.
Cut grade · Favorable: Very Good as issued by IGI, on IGI's own scale. The measured proportions above tell you more than the label.

Does a gray ring or glassy patch show around the center when you look straight down?
With a shallow 59.1% 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?
Can you show me the inscribed report number under a loupe before it is set?