1.00 ct Round Brilliant Laboratory-Grown Diamond

What reads well

• Table 56% and depth 59.9% are within the classic round brilliant range.
• The IGI Ideal cut grade corroborates the measured proportions.
• Excellent polish and symmetry, the top finish grades.
• D color is in the colorless range.
• IF clarity: inclusions are not a practical visual factor.

What deserves a closer look

• Crown 33.2° / pavilion 40.3° fall outside the pairing zone associated with strong light return.

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 · Ideal

59.9% 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

33.2° sits in the 32–36° zone where crown angles typically balance fire and brightness.

Pavilion angle · Closer look

40.3° is shallower than the narrow 40.5–41.3° zone. Shallow pavilions can let light pass straight through, looking glassy.

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 (faceted): a durable girdle thickness that doesn't hide meaningful weight.

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 · Ideal

Internally Flawless (IF): inclusions, if any, are only visible under magnification.

Fluorescence · Ideal

None: no meaningful effect on appearance.

Cut grade · Ideal

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

What to check on the exact stone

• Does a gray ring or glassy patch show around the center when you look straight down?
• Does this HPHT-grown diamond look neutral white beside another stone in daylight, with no gray or blue cast?
• Can you show me the inscribed report number under a loupe before it is set?

Report facts

Origin

Laboratory-grown

Carat

1.00 ct

Shape

Round Brilliant

Cut grade

Ideal (IGI)

Color

D

Clarity

IF

Measurements

6.48–6.54 × 3.90 mm

Table

56%

Total depth

59.9%

Crown angle

33.2°

Pavilion angle

40.3°

Polish

Excellent

Symmetry

Excellent

Girdle

Medium (faceted)

Culet

Pointed

Fluorescence

None