The Carat Standard

IGI report LG772683663

1.06 ct Round Brilliant Laboratory-Grown Diamond

84/100 · Refined

A strong, composed candidate on paper.

What reads well

  • E color is in the colorless range.
  • VS1 clarity is typically eye-clean in a round brilliant.
  • No fluorescence: no haze risk to weigh.
  • The report states no indication of post-growth treatment.

What deserves a closer look

  • Crown 37° / pavilion 40.1° fall outside the pairing zone associated with strong light return.

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
62.3% 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 · Closer look
A 37° 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 · Closer look
40.1° is shallower than the narrow 40.5–41.3° zone. Shallow pavilions can let light pass straight through, looking glassy.
Polish · Favorable
Very Good polish is a fine result; the difference from Excellent is rarely visible without magnification.
Symmetry · Favorable
Very Good symmetry is a fine result; the difference from Excellent is rarely visible without magnification.
Girdle · Favorable
Slightly thick to thick (faceted): durable, on the thicker side for a round brilliant, so a little weight sits in the rim.
Culet · Ideal
Pointed: no visible culet facet when viewed face-up.
Color · Ideal
E is in the colorless range and faces up white in any metal.
Clarity · Favorable
VS1 is typically eye-clean.
Fluorescence · Ideal
None: no meaningful effect on appearance.
Cut grade · Favorable
Very Good 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 the large table look bright but flat, with less colored fire than you expected?
  • 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
1.06 ct
Shape
Round Brilliant
Cut grade
Very Good (IGI)
Color
E
Clarity
VS1
Measurements
6.35–6.41 × 3.98 mm
Table
60%
Total depth
62.3%
Crown angle
37°
Pavilion angle
40.1°
Polish
Very Good
Symmetry
Very Good
Girdle
Slightly thick to thick (faceted)
Culet
Pointed
Fluorescence
None

About The Carat Standard Score

How The Carat Standard reads a report