IGI report LG788669818
3.10 ct Emerald Laboratory-Grown Diamond
89/100 · Refined
A strong candidate on paper; confirm its light pattern in imagery.
What reads well
- A 1.43:1 length-to-width ratio sits in the classic emerald cut range.
- Face-up spread (10.07 × 7.05 mm) is typical or better for a 3.10 ct emerald cut.
- Table 64% and depth 66.1% fall in the typical emerald cut range.
- Excellent polish and symmetry, the top finish grades.
- E color is in the colorless range.
What deserves a closer look
- VS2 in an emerald cut is usually eye-clean, but step cuts show inclusions more readily than brilliants; check the plot.
- Screening only: for this emerald cut, check images or video of the exact stone for the "hall of mirrors" step pattern, any see-through window under the table and clean corners.
- Treatment status is not stated on the report. For a laboratory-grown diamond, ask whether it is as-grown or post-growth treated.
The reading, field by field
- Table · Ideal
- At 64%, the table sits within the typical 60–69% range for an emerald cut, balancing brightness with fire.
- Total depth · Ideal
- 66.1% is within the typical 60–69% range for an emerald cut, keeping weight where it contributes to face-up size and light return.
- Length-to-width · Ideal
- A 1.43:1 outline is within the classic 1.3–1.5:1 range for an emerald 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: a durable girdle thickness that doesn't hide meaningful weight.
- Culet · Ideal
- Long: a keel-line culet, normal for elongated step and modified cuts.
- Color · Ideal
- E is in the colorless range and faces up white in any metal.
- Clarity · Favorable
- VS2 is typically eye-clean, though step cuts show inclusions more readily — worth a close look at the images.
- Fluorescence · Ideal
- None: no meaningful effect on appearance.
What to check on the exact stone
- Step cuts show inclusions openly—is this VS2 diamond eye-clean through the table 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?
Report facts
- Origin
- Laboratory-grown
- Carat
- 3.10 ct
- Shape
- Emerald
- Color
- E
- Clarity
- VS2
- Cut
- Not stated
- Measurements
- 10.07 × 7.05 × 4.66 mm
- Table
- 64%
- Depth
- 66.1%
- Crown angle
- Not stated
- Pavilion angle
- Not stated
- Girdle
- Medium
- Culet
- Long
- Polish
- Excellent
- Symmetry
- Excellent
- Fluorescence
- None