1.50 ct Round Brilliant Diamond

What reads well

• H color should face up white in most settings.
• Faint fluorescence: no haze risk to weigh.

What deserves a closer look

• The GIA cut grade is Good: the lab's own assessment points to less brightness and fire than its top tier.
• Crown 39.5° / pavilion 40.8° fall outside the pairing zone associated with strong light return.
• Depth 66.6% sits outside the preferred round range.
• Thick to very thick girdle: a thick girdle carries hidden weight and can reduce face-up size.
• The diameter is small for 1.50 ct: weight is carried below the girdle rather than face-up.

The reading, field by field

Table · Closer look

A 60% table is larger than typical for a round brilliant (53–59%). Large tables can read bright but flatter, with less fire and contrast.

Total depth · Closer look

66.6% is deeper than typical for a round brilliant (59.5–63%). Extra depth holds weight below the girdle, so the stone can face up smaller than its carat weight suggests.

Crown angle · Closer look

A 39.5° crown is steeper than the typical 32–36° zone. Steep crowns can add fire, but only pair well with a slightly shallower pavilion.

Pavilion angle · Ideal

40.8° is inside the narrow 40.5–41.3° zone where the pavilion returns light most efficiently.

Polish · Ideal

Excellent polish is the top finish grade — facets are cleanly executed with nothing that would soften sparkle.

Symmetry · Favorable

Very Good symmetry is a fine result; the difference from Excellent is rarely visible without magnification.

Girdle · Closer look

Thick to very thick, faceted, 7.0%: 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.

Clarity · Ideal

VVS1: inclusions, if any, are only visible under magnification.

Fluorescence · Ideal

Faint: no meaningful effect on appearance.

Cut grade · Closer look

Good as issued by GIA, on GIA's own scale. The measured proportions above tell you more than the label.

What to check on the exact stone

• Does the steep crown give lively fire without making the center look darker?
• With 66.6% depth, does this stone face up smaller than a typical 1.50 ct round?
• Does the large table look bright but flat, with less colored fire than you expected?
• Can you show me the inscribed report number under a loupe before it is set?

Report facts

Origin

Natural

Carat

1.50 ct

Shape

Round Brilliant

Cut grade

Good (GIA)

Color

H

Clarity

VVS1

Measurements

6.91–6.96 × 4.62 mm

Table

60%

Total depth

66.6%

Crown angle

39.5°

Pavilion angle

40.8°

Polish

Excellent

Symmetry

Very Good

Girdle

Thick to very thick, faceted, 7.0%

Culet

None

Fluorescence

Faint