IGI report LG788659246
1.02 ct Round Brilliant Laboratory-Grown Diamond
90/100 · Refined
A strong, composed candidate on paper.
What reads well
- The IGI Ideal cut grade corroborates the measured proportions.
- Excellent polish and symmetry, the top finish grades.
- D color is in the colorless range.
- VVS2 clarity: inclusions are not a practical visual factor.
- No fluorescence: no haze risk to weigh.
What deserves a closer look
- Treatment status is not stated on the report. For a laboratory-grown diamond, ask whether it is as-grown or post-growth treated.
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 · Closer look
- 59.4% is shallower than typical for a round brilliant (59.5–63%). That spreads the stone face-up but raises the risk of windowing — a glassy, see-through center.
- Crown angle · Ideal
- 33.4° sits in the 32–36° zone where crown angles typically balance fire and brightness.
- Pavilion angle · Ideal
- 40.6° 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): a durable girdle thickness that doesn't hide meaningful weight.
- Culet · Ideal
- None: 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
- VVS2: 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
- With a shallow 59.4% depth, can you see a glassy, see-through patch in the center?
- Does the large table look bright but flat, with less colored fire than you expected?
- Does this CVD diamond show any brown or gray undertone face-up in daylight?
- Can you show me the inscribed report number under a loupe before it is set?
Report facts
- Origin
- Laboratory-grown
- Carat
- 1.02 ct
- Shape
- Round Brilliant
- Color
- D
- Clarity
- VVS2
- Cut
- Ideal
- Measurements
- 6.54–6.57 × 3.90 mm
- Table
- 60%
- Depth
- 59.4%
- Crown angle
- 33.4°
- Pavilion angle
- 40.6°
- Girdle
- Medium to slightly thick (faceted)
- Culet
- None
- Polish
- Excellent
- Symmetry
- Excellent
- Fluorescence
- None