The Carat Standard

GIA report 1323678673

1.20 ct Round Brilliant Diamond

79/100 · Considered

A balanced profile with a few questions to carry forward.

What reads well

  • The GIA Excellent cut grade corroborates the measured proportions.
  • Excellent polish and symmetry, the top finish grades.
  • G color should face up white in most settings.
  • No fluorescence: no haze risk to weigh.
  • Medium to slightly thick girdle balances durability and weight retention.

What deserves a closer look

  • SI2 is often not eye-clean in a round brilliant; view an image or video of this exact stone.
  • Crown 34° / pavilion 41.8° fall outside the pairing zone associated with strong light return.
  • Clouds are referenced on the report; confirm the stone looks transparent rather than hazy.

The reading, field by field

Table · Ideal
At 59%, the table sits within the typical 53–59% range for a round brilliant, balancing brightness with fire.
Total depth · Ideal
62.8% is within the typical 59.5–63% range for a round brilliant, keeping weight where it contributes to face-up size and light return.
Crown angle · Ideal
34° sits in the 32–36° zone where crown angles typically balance fire and brightness.
Pavilion angle · Closer look
41.8° is steeper than the narrow 40.5–41.3° zone. Deep pavilions can leak light through the sides and darken the center.
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 · Ideal
Medium to slightly thick, faceted, 4.0%: a durable girdle thickness that doesn't hide meaningful weight.
Culet · Ideal
None: no visible culet facet when viewed face-up.
Color · Favorable
G is near-colorless and faces up white in most settings.
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.
Cut grade · Ideal
Excellent 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 center turn dark or lose sparkle when you tilt the diamond face-up?
  • Does the diamond look crisp and transparent in natural light, or is there any milky haze?
  • Can you show me the inscribed report number under a loupe before it is set?

Report facts

Origin
Natural
Carat
1.20 ct
Shape
Round Brilliant
Cut grade
Excellent (GIA)
Color
G
Clarity
SI2
Measurements
6.73–6.77 × 4.24 mm
Table
59%
Total depth
62.8%
Crown angle
34°
Pavilion angle
41.8°
Polish
Excellent
Symmetry
Excellent
Girdle
Medium to slightly thick, faceted, 4.0%
Culet
None
Fluorescence
None

About The Carat Standard Score

How The Carat Standard reads a report