IGI report LG778688202

1.91 ct Round Brilliant Laboratory-Grown Diamond

90/100 · Refined

A strong, composed candidate on paper.

What reads well

Crown 33° with pavilion 41.1° sits in the well-regarded pairing zone for brightness and fire.
The IGI Excellent cut grade corroborates the measured proportions.
Excellent polish and symmetry, the top finish grades.
E color is in the colorless range.
No fluorescence: no haze risk to weigh.

Table 61% sits outside the preferred round range.
Confirm this SI1 round brilliant is eye-clean from an image or video; the report plot shows where inclusions sit.
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: 60.3% 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: 33° sits in the 32–36° zone where crown angles typically balance fire and brightness.
Pavilion angle · Ideal: 41.1° is inside the narrow 40.5–41.3° zone where the pavilion returns light most efficiently.
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: E is in the colorless range and faces up white in any metal.
Clarity · Favorable: SI1 is often eye-clean in a round brilliant, but not always — check where the inclusions sit.
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?
Is this SI1 diamond eye-clean face-up from about 10 inches away?
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?