The Carat Standard

GIA report 2457215395

1.50 ct Radiant Diamond

71/100 · Character

Distinctive trade-offs that should be viewed deliberately.

What reads well

  • Excellent polish and symmetry, the top finish grades.
  • Medium blue fluorescence can make I color face up a touch whiter in daylight.

What deserves a closer look

  • SI2 is often not eye-clean in a radiant; view an image or video of this exact stone.
  • A 1.56:1 length-to-width ratio is outside the classic radiant range; the outline will look more elongated than typical.
  • The depth 74.4% sits outside the typical radiant range.
  • Face-up area is about 13% below typical radiants of this weight, suggesting hidden weight in depth.
  • 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.

The reading, field by field

Table · Ideal
At 67%, the table sits within the typical 60–70% range for a radiant, balancing brightness with fire.
Total depth · Closer look
74.4% is deeper than typical for a radiant (61–68%). Extra depth holds weight below the girdle, so the stone can face up smaller than its carat weight suggests.
Length-to-width · Favorable
A 1.56:1 outline is longer and slimmer than the classic 1.2–1.5:1 range for a radiant — a matter of taste, but worth seeing in person.
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
Extremely 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
I may show slight warmth at the corners of a radiant, 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 · Favorable
Medium Blue fluorescence is rarely visible in normal lighting.

What to check on the exact stone

  • With 74.4% depth, does this stone face up smaller than a typical 1.50 ct radiant?
  • 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
Radiant
Cut grade
Not given for this shape
Color
I
Clarity
SI2
Measurements
8.04 × 5.16 × 3.84 mm
Table
67%
Total depth
74.4%
Crown angle
Not given for this shape
Pavilion angle
Not given for this shape
Polish
Excellent
Symmetry
Excellent
Girdle
Extremely thick, polished
Culet
None
Fluorescence
Medium Blue

About The Carat Standard Score

How The Carat Standard reads a report