3.00 ct Round Brilliant Diamond

What reads well

• The GIA Excellent cut grade corroborates the measured proportions.
• Excellent polish and symmetry, the top finish grades.
• H color in a round brilliant usually faces up near-colorless once set.
• No fluorescence: no haze risk to weigh.
• Medium to slightly thick girdle balances durability and weight retention.

What deserves a closer look

• Crown 36.5° / pavilion 41° fall outside the pairing zone associated with strong light return.
• Depth 63.5% sits outside the preferred round range.
• Confirm this SI1 round brilliant is eye-clean from an image or video; the report plot shows where inclusions sit.
• Feathers are listed: check the plot for any that reach the girdle or surface, which matters for durability.

The reading, field by field

Table · Ideal

At 56%, the table sits within the typical 53–59% range for a round brilliant, balancing brightness with fire.

Total depth · Closer look

63.5% 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 36.5° 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

41° 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

Medium to slightly thick, faceted, 3.5%: a durable girdle thickness that doesn't hide meaningful weight.

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 · Favorable

SI1 is often eye-clean in a round brilliant, but not always — check where the inclusions sit.

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 steep crown give lively fire without making the center look darker?
• With 63.5% depth, does this stone face up smaller than a typical 3.00 ct round?
• 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

H

Clarity

SI1

Measurements

9.08–9.16 × 5.79 mm

Table

56%

Total depth

63.5%

Crown angle

36.5°

Pavilion angle

41°

Polish

Excellent

Symmetry

Excellent

Girdle

Medium to slightly thick, faceted, 3.5%

Culet

None

Fluorescence

None