The Carat Standard

GIA report 1527857413

3.42 ct Cushion Laboratory-Grown Diamond

90/100 · Refined

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

What reads well

  • A 1.28:1 length-to-width ratio sits in the classic cushion range.
  • Face-up spread (10.27 × 8.04 mm) is typical or better for a 3.42 ct cushion.
  • Table 60% and depth 66.5% fall in the typical cushion range.
  • Excellent polish and symmetry, the top finish grades.
  • D color is in the colorless range.

What deserves a closer look

  • Screening only: for this cushion, check images or video of the exact stone for the facet pattern (bold, chunky flashes or finer "crushed ice") and any dark areas under the table.
  • Treatment status is not stated on the report. For a laboratory-grown diamond, ask whether it is as-grown or post-growth treated.
  • Not stated on the report: culet. This is not assumed to be favorable, and confidence is lower.

The reading, field by field

Table · Ideal
At 60%, the table sits within the typical 56–66% range for a cushion, balancing brightness with fire.
Total depth · Ideal
66.5% is within the typical 61–69% range for a cushion, keeping weight where it contributes to face-up size and light return.
Length-to-width · Ideal
A 1.28:1 outline is within the classic 1–1.35:1 range for a cushion.
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
Slightly thick - thick (faceted): a durable girdle thickness that doesn't hide meaningful weight.
Color · Ideal
D is in the colorless range and faces up white in any metal.
Clarity · Ideal
VVS1: inclusions, if any, are only visible under magnification.
Fluorescence · Ideal
None: no meaningful effect on appearance.

What to check on the exact stone

  • Does this cushion produce broad, chunky flashes or small needle-like crushed-ice sparkle?
  • Can you show me the inscribed report number under a loupe before it is set?

Report facts

Origin
Laboratory-grown
Carat
3.42 ct
Shape
Cushion
Color
D
Clarity
VVS1
Cut
Not stated
Measurements
10.27 × 8.04 × 5.34 mm
Table
60%
Depth
66.5%
Crown angle
Not stated
Pavilion angle
Not stated
Girdle
Slightly thick to thick, faceted
Culet
None
Polish
Excellent
Symmetry
Excellent
Fluorescence
None

How The Carat Standard reads a report