The Carat Standard

GIA report 1569157140

1.50 ct Oval Diamond

69/100 · Character

Distinctive trade-offs that should be viewed deliberately.

What reads well

  • A 1.41:1 length-to-width ratio sits in the classic oval range.
  • Face-up spread (8.92 × 6.34 mm) is typical or better for a 1.50 ct oval.
  • Excellent polish and symmetry, the top finish grades.
  • No fluorescence: no haze risk to weigh.

What deserves a closer look

  • SI2 is often not eye-clean in an oval; view an image or video of this exact stone.
  • Clouds are referenced on the report; confirm the stone looks transparent rather than hazy.
  • A 64.6% depth is on the deep side for an oval; deeper pavilions are associated with a stronger bow-tie and hidden weight.
  • Thick to very thick girdle: a thick girdle carries hidden weight and can reduce face-up size (thicker points are common in fancy shapes).
  • Screening only: for this oval, check images or video of the exact stone for the bow-tie (a dark band across the centre) and whether both ends look even.

The reading, field by field

Table · Ideal
At 59%, the table sits within the typical 53–63% range for an oval, balancing brightness with fire.
Total depth · Closer look
64.6% is deeper than typical for an oval (58–63.5%). Extra depth holds weight below the girdle, so the stone can face up smaller than its carat weight suggests and may show a stronger bow-tie.
Length-to-width · Ideal
A 1.41:1 outline is within the classic 1.3–1.5:1 range for an oval.
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, 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 · Closer look
K shows visible warmth. It suits buyers who like a softer, warmer look, and pairs best with yellow or rose gold.
Clarity · Closer look
SI2: inclusions may be visible to the eye. Confirm with images or video before buying.
Fluorescence · Ideal
None: no meaningful effect on appearance.

What to check on the exact stone

  • With 64.6% depth, does this stone face up smaller than a typical 1.50 ct oval?
  • 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?
  • Can you show me the inscribed report number under a loupe before it is set?

Report facts

Origin
Natural
Carat
1.50 ct
Shape
Oval
Cut grade
Not given for this shape
Color
K
Clarity
SI2
Measurements
8.92 × 6.34 × 4.10 mm
Table
59%
Total depth
64.6%
Crown angle
Not given for this shape
Pavilion angle
Not given for this shape
Polish
Excellent
Symmetry
Excellent
Girdle
Thick to very thick, faceted
Culet
None
Fluorescence
None

About The Carat Standard Score

How The Carat Standard reads a report