IGI report LG778688179

2.51 ct Round Brilliant Laboratory-Grown Diamond

90/100 · Refined

A strong, composed candidate on paper.

What reads well

Crown 34.3° with pavilion 41° sits in the well-regarded pairing zone for brightness and fire.
The IGI Excellent cut grade corroborates the measured proportions.
E color is in the colorless range.
VS1 clarity is typically eye-clean in a round brilliant.
No fluorescence: no haze risk to weigh.

Table 61% 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 61% 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 · Ideal: 60.7% is within the typical 59.5–63% range for a round brilliant, keeping weight where it contributes to face-up size and light return.
Crown angle · Ideal: 34.3° sits in the 32–36° zone where crown angles typically balance fire and brightness.
Pavilion angle · Ideal: 41° is inside the narrow 40.5–41.3° zone where the pavilion returns light most efficiently.
Polish · Favorable: Very Good polish is a fine result; the difference from Excellent is rarely visible without magnification.
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: E is in the colorless range and faces up white in any metal.
Clarity · Favorable: VS1 is typically eye-clean.
Fluorescence · Ideal: None: no meaningful effect on appearance.
Cut grade · Ideal: Excellent as issued by IGI, on IGI's own scale. The measured proportions above tell you more than the label.

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?
With Very Good polish, are there visible surface polish lines or wheel marks?
Can you show me the inscribed report number under a loupe before it is set?