The Carat Standard

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

About The Carat Standard Score

How The Carat Standard reads a report