The Carat Standard

IGI report LG781638019

1.50 ct Pear Laboratory-Grown Diamond

89/100 · Refined

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

What reads well

  • A 1.61:1 length-to-width ratio sits in the classic pear range.
  • Face-up spread (10.00 × 6.20 mm) is typical or better for a 1.50 ct pear.
  • Excellent polish and symmetry, the top finish grades.
  • D color is in the colorless range.
  • VS1 clarity is typically eye-clean in a pear.

What deserves a closer look

  • A 64.2% depth is on the deep side for a pear; 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 pear, check images or video of the exact stone for the bow-tie, even shoulders and a point that lines up with the centre of the rounded end.
  • Treatment status is not stated on the report. For a laboratory-grown diamond, ask whether it is as-grown or post-growth treated.

The reading, field by field

Table · Closer look
A 64% table is larger than typical for a pear (53–63%). Large tables can read bright but flatter, with less fire and contrast.
Total depth · Closer look
64.2% is deeper than typical for a pear (58–64%). 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 1.61:1 outline is within the classic 1.45–1.75:1 range for a pear.
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
Pointed: no visible culet facet when viewed face-up.
Color · Ideal
D is in the colorless range and faces up white in any metal.
Clarity · Favorable
VS1 is typically eye-clean.
Fluorescence · Ideal
None: no meaningful effect on appearance.

What to check on the exact stone

  • With 64.2% depth, does this stone face up smaller than a typical 1.50 ct pear?
  • Does the large table look bright but flat, with less colored fire than you expected?
  • In a face-up video, does the bow-tie flicker as the stone tilts, or stay a fixed dark band across the center?
  • Can you show me the inscribed report number under a loupe before it is set?

Report facts

Origin
Laboratory-grown
Carat
1.50 ct
Shape
Pear
Cut grade
Not given for this shape
Color
D
Clarity
VS1
Measurements
10.00 × 6.20 × 3.98 mm
Table
64%
Total depth
64.2%
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
Pointed
Fluorescence
None

About The Carat Standard Score

How The Carat Standard reads a report