IGI report LG771604052

1.70 ct Round Brilliant Laboratory-Grown Diamond

86/100 · Refined

A strong, composed candidate on paper.

What reads well

Crown 36.6° / pavilion 41.1° fall outside the pairing zone associated with strong light return.
Depth 64% 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 · Ideal: At 55%, the table sits within the typical 53–59% range for a round brilliant, balancing brightness with fire.
Total depth · Closer look: 64% is deeper than typical for a round brilliant (59.5–63%). Extra depth holds weight below the girdle, so the stone can face up smaller than its carat weight suggests.
Crown angle · Closer look: A 36.6° crown is steeper than the typical 32–36° zone. Steep crowns can add fire, but only pair well with a slightly shallower pavilion.
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: F 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 · Favorable: Very Good as issued by IGI, on IGI's own scale. The measured proportions above tell you more than the label.