The Carat Standard

IGI report LG770682303

1.51 ct Radiant Laboratory-Grown Diamond

88/100 · Refined

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

What reads well

  • Face-up spread (8.74 × 5.49 mm) is typical or better for a 1.51 ct radiant.
  • Table 63% and depth 64.1% fall in the typical radiant range.
  • Excellent polish and symmetry, the top finish grades.
  • E color is in the colorless range.
  • VS1 clarity is typically eye-clean in a radiant.

What deserves a closer look

  • A 1.59:1 length-to-width ratio is outside the classic radiant range; the outline will look more elongated than typical.
  • 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.

What to check on the exact stone

  • 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
1.51 ct
Shape
Radiant
Color
E
Clarity
VS1
Cut
Not stated
Measurements
8.74 × 5.49 × 3.52 mm
Table
63%
Depth
64.1%
Crown angle
Not stated
Pavilion angle
Not stated
Girdle
Slightly thick
Culet
Pointed
Polish
Excellent
Symmetry
Excellent
Fluorescence
None

How The Carat Standard reads a report