The Carat Standard

GIA report 7541830100

1.50 ct Cushion Diamond

78/100 · Considered

A balanced profile with a few questions to carry forward.

What reads well

  • A 1.27:1 length-to-width ratio sits in the classic cushion range.
  • Face-up spread (7.40 × 5.83 mm) is typical or better for a 1.50 ct cushion.
  • Excellent polish and symmetry, the top finish grades.
  • Faint fluorescence: no haze risk to weigh.

What deserves a closer look

  • SI2 is often not eye-clean in a cushion; view an image or video of this exact stone.
  • Medium to very thick girdle: a thick girdle carries hidden weight and can reduce face-up size (thicker points are common in fancy shapes).
  • Feathers are listed: check the plot for any that reach the girdle or surface, which matters for durability.
  • J color in a 1.50 ct cushion may show some warmth, especially at the corners.
  • 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.

The reading, field by field

Table · Ideal
At 65%, the table sits within the typical 56–66% range for a cushion, balancing brightness with fire.
Total depth · Closer look
69.7% is deeper than typical for a cushion (61–69%). Extra depth holds weight below the girdle, so the stone can face up smaller than its carat weight suggests.
Length-to-width · Ideal
A 1.27:1 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 · Closer look
Medium to very thick, faceted: a thick girdle carries weight in the rim, so the stone can face up a little smaller for its carat weight. It is durable, though.
Culet · Ideal
None: no visible culet facet when viewed face-up.
Color · Favorable
J may show slight warmth, especially next to white metal. Yellow or rose gold tends to complement it.
Clarity · Closer look
SI2: inclusions may be visible to the eye. Confirm with images or video before buying.
Fluorescence · Ideal
Faint: no meaningful effect on appearance.

What to check on the exact stone

  • With 69.7% depth, does this stone face up smaller than a typical 1.50 ct cushion?
  • Does the feather reach the outer edge where a setting prong could put pressure on it?
  • Is this SI2 diamond eye-clean face-up from about 10 inches away?
  • Can you show me the inscribed report number under a loupe before it is set?

Report facts

Origin
Natural
Carat
1.50 ct
Shape
Cushion
Cut grade
Not given for this shape
Color
J
Clarity
SI2
Measurements
7.40 × 5.83 × 4.06 mm
Table
65%
Total depth
69.7%
Crown angle
Not given for this shape
Pavilion angle
Not given for this shape
Polish
Excellent
Symmetry
Excellent
Girdle
Medium to very thick, faceted
Culet
None
Fluorescence
Faint

About The Carat Standard Score

How The Carat Standard reads a report