The Carat Standard

GIA report 1558861752

3.00 ct Round Brilliant Diamond

73/100 · Character

Distinctive trade-offs that should be viewed deliberately.

What reads well

  • Crown 33° with pavilion 40.8° sits in the well-regarded pairing zone for brightness and fire.
  • The GIA Excellent cut grade corroborates the measured proportions.
  • Excellent polish and symmetry, the top finish grades.
  • No fluorescence: no haze risk to weigh.
  • 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.
  • Clouds are referenced on the report; confirm the stone looks transparent rather than hazy.
  • Feathers are listed: check the plot for any that reach the girdle or surface, which matters for durability.
  • The report notes internal graining; these can soften transparency in some stones.
  • I color can show slight warmth in some settings, more so in white metal.

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 · Ideal
59.7% 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
33° sits in the 32–36° zone where crown angles typically balance fire and brightness.
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 · Ideal
Excellent symmetry is the top finish grade — facets are cleanly executed with nothing that would soften sparkle.
Girdle · Ideal
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
I may show slight warmth, 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 · 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 large table look bright but flat, with less colored fire than you expected?
  • 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
3.00 ct
Shape
Round Brilliant
Cut grade
Excellent (GIA)
Color
I
Clarity
SI2
Measurements
9.31–9.34 × 5.57 mm
Table
60%
Total depth
59.7%
Crown angle
33°
Pavilion angle
40.8°
Polish
Excellent
Symmetry
Excellent
Girdle
Slightly thick, faceted, 4.0%
Culet
None
Fluorescence
None

About The Carat Standard Score

How The Carat Standard reads a report