IGI report LG787646716
1.60 ct Radiant Laboratory-Grown Diamond
89/100 · Refined
A strong candidate on paper; confirm its light pattern in imagery.
What reads well
- A 1.34:1 length-to-width ratio sits in the classic radiant range.
- Face-up spread (8.03 × 6.00 mm) is typical or better for a 1.60 ct radiant.
- Table 64% and depth 62.3% fall in the typical radiant range.
- E color is in the colorless range.
- VS1 clarity is typically eye-clean in a radiant.
What deserves a closer look
- Screening only: for this radiant, check images or video of the exact stone for the sparkle pattern (defined flashes or "crushed ice") and any dark or see-through 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 60–70% range for a radiant, balancing brightness with fire.
- Total depth · Ideal
- 62.3% is within the typical 61–68% range for a radiant, keeping weight where it contributes to face-up size and light return.
- Length-to-width · Ideal
- A 1.34:1 outline is within the classic 1.2–1.5:1 range for a radiant.
- Polish · Favorable
- Very Good polish is a fine result; the difference from Excellent is rarely visible without magnification.
- Symmetry · Favorable
- Very Good symmetry is a fine result; the difference from Excellent is rarely visible without magnification.
- Girdle · Ideal
- Medium: 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.
What to check on the exact stone
- Does this CVD diamond show any brown or gray undertone face-up in daylight?
- With Very Good polish and Very Good symmetry, are there visible misaligned facets or wheel marks?
- Can you show me the inscribed report number under a loupe before it is set?
Report facts
- Origin
- Laboratory-grown
- Carat
- 1.60 ct
- Shape
- Radiant
- Color
- E
- Clarity
- VS1
- Cut
- Not stated
- Measurements
- 8.03 × 6.00 × 3.74 mm
- Table
- 64%
- Depth
- 62.3%
- Crown angle
- Not stated
- Pavilion angle
- Not stated
- Girdle
- Medium
- Culet
- Pointed
- Polish
- Very Good
- Symmetry
- Very Good
- Fluorescence
- None