IGI report LG752535374

3.06 ct Square Cushion Laboratory-Grown Diamond

90/100 · Refined

A strong candidate on paper; confirm its light pattern in imagery.

What reads well

A 1.00:1 length-to-width ratio sits in the classic Old Mine cut range.
Face-up spread (8.59 × 8.58 mm) is typical or better for a 3.06 ct Old Mine cut.
Table 52% and depth 66.2% fall in the typical Old Mine cut range.
Excellent polish and symmetry, the top finish grades.
E color is in the colorless range.

Screening only: for this Old Mine cut, check images or video of the exact stone for the broad, chunky antique flash pattern and how the open culet looks face-up.
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 52%, the table sits within the typical 40–55% range for an Old Mine cut, balancing brightness with fire.
Total depth · Ideal: 66.2% is within the typical 60–70% range for an Old Mine cut, keeping weight where it contributes to face-up size and light return.
Length-to-width · Ideal: A 1:1 outline is within the classic 1–1.4:1 range for an Old Mine cut.
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: Large: the open culet traditional to an Old Mine cut, seen face-up as a small circle at the center and part of its antique character.
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.

Does it show the broad, chunky flashes of an antique cut, and how much does the open culet show face-up?
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?