IGI report LG786692081
1.48 ct Round Brilliant Laboratory-Grown Diamond
96/100 · Signature
An unusually disciplined report profile.
What reads well
- Crown 35.6° with pavilion 40.7° sits in the well-regarded pairing zone for brightness and fire.
- Table 56% and depth 61.9% are within the classic round brilliant range.
- The IGI Ideal cut grade corroborates the measured proportions.
- Excellent polish and symmetry, the top finish grades.
- E color is in the colorless range.
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
- 61.9% 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
- 35.6° sits in the 32–36° zone where crown angles typically balance fire and brightness.
- Pavilion angle · Ideal
- 40.7° 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 (Faceted): a durable girdle thickness that doesn't hide meaningful weight.
- 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 · Ideal
- VVS1: 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 this HPHT-grown diamond look neutral white beside another stone in daylight, with no gray or blue cast?
- Can I see this stone in soft daylight away from store spotlights to verify its sparkle?
- Does the sparkle look bright and even all the way out to the edges?
- Can you show me the inscribed report number under a loupe before it is set?
Report facts
- Origin
- Laboratory-grown
- Carat
- 1.48 ct
- Shape
- Round Brilliant
- Color
- E
- Clarity
- VVS1
- Cut
- Ideal
- Measurements
- 7.29–7.35 × 4.53 mm
- Table
- 56%
- Depth
- 61.9%
- Crown angle
- 35.6°
- Pavilion angle
- 40.7°
- Girdle
- Medium (faceted)
- Culet
- Pointed
- Polish
- Excellent
- Symmetry
- Excellent
- Fluorescence
- None