The Carat Standard

GIA report 2556685417

1.50 ct Asscher Diamond

78/100 · Considered

A balanced profile with a few questions to carry forward.

What reads well

  • A 1.02:1 length-to-width ratio sits in the classic Asscher / square emerald range.
  • Face-up spread (6.19 × 6.05 mm) is typical or better for a 1.50 ct Asscher / square emerald.
  • Table 66% and depth 69.7% fall in the typical Asscher / square emerald range.
  • Excellent polish and symmetry, the top finish grades.
  • No fluorescence: no haze risk to weigh.

What deserves a closer look

  • SI1 in an Asscher / square emerald: the open step-cut table makes inclusions easier to see. View an image or video of this exact stone.
  • Clouds are referenced on the report; confirm the stone looks transparent rather than hazy.
  • Thick 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.
  • Screening only: for this Asscher / square emerald, check images or video of the exact stone for the concentric "hall of mirrors", the windmill pattern at the corners and any see-through window.

The reading, field by field

Table · Ideal
At 66%, the table sits within the typical 58–68% range for an Asscher / square emerald, balancing brightness with fire.
Total depth · Ideal
69.7% is within the typical 60–70% range for an Asscher / square emerald, keeping weight where it contributes to face-up size and light return.
Length-to-width · Ideal
A 1.02:1 outline is within the classic 1–1.05:1 range for an Asscher / square emerald.
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
Thick to very thick, polished: 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
H is near-colorless and faces up white in most settings, though an Asscher / square emerald can show a hint of warmth at the corners.
Clarity · Closer look
SI1 in a step cut often shows inclusions through the open table. Confirm eye-cleanliness with images or video.
Fluorescence · Ideal
None: no meaningful effect on appearance.

What to check on the exact stone

  • Does the diamond look crisp and transparent in natural light, or is there any milky haze?
  • Does the feather reach the outer edge where a setting prong could put pressure on it?
  • With open step facets, is the center completely eye-clean without any visible dark marks?
  • Can you show me the inscribed report number under a loupe before it is set?

Report facts

Origin
Natural
Carat
1.50 ct
Shape
Asscher
Cut grade
Not given for this shape
Color
H
Clarity
SI1
Measurements
6.19 × 6.05 × 4.22 mm
Table
66%
Total depth
69.7%
Crown angle
Not given for this shape
Pavilion angle
Not given for this shape
Polish
Excellent
Symmetry
Excellent
Girdle
Thick to very thick, polished
Culet
None
Fluorescence
None

About The Carat Standard Score

How The Carat Standard reads a report