IGI report LG780643487
1.23 ct Princess Laboratory-Grown Diamond
89/100 · Refined
A strong candidate on paper; confirm its light pattern in imagery.
What reads well
- A 1.03:1 length-to-width ratio sits in the classic princess range.
- Face-up spread (5.96 × 5.76 mm) is typical or better for a 1.23 ct princess.
- F color is in the colorless range.
- VS2 clarity is typically eye-clean in a princess.
- No fluorescence: no haze risk to weigh.
What deserves a closer look
- The table 76% sits outside the typical princess range.
- Screening only: for this princess, check images or video of the exact stone for dark areas across the corners or a see-through centre.
- 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 76% table is larger than typical for a princess (63–74%). Large tables can read bright but flatter, with less fire and contrast.
- Total depth · Ideal
- 70.5% is within the typical 64–75% range for a princess, keeping weight where it contributes to face-up size and light return.
- Length-to-width · Ideal
- A 1.03:1 outline is within the classic 1–1.05:1 range for a princess.
- Polish · Ideal
- Excellent polish is the top finish grade — facets are cleanly executed with nothing that would soften sparkle.
- Symmetry · Favorable
- Very Good symmetry is a fine result; the difference from Excellent is rarely visible without magnification.
- Girdle · Ideal
- Slightly thick: a durable girdle thickness that doesn't hide meaningful weight.
- Culet · Ideal
- Pointed: no visible culet facet when viewed face-up.
- Color · Ideal
- F is in the colorless range and faces up white in any metal.
- Clarity · Favorable
- VS2 is typically eye-clean.
- Fluorescence · Ideal
- None: no meaningful effect on appearance.
What to check on the exact stone
- Does the large table look bright but flat, with less colored fire than you expected?
- Is this VS2 diamond eye-clean face-up from about 10 inches away?
- Will all four sharp corners be seated safely in V-prongs to prevent corner fractures?
- Can you show me the inscribed report number under a loupe before it is set?
Report facts
- Origin
- Laboratory-grown
- Carat
- 1.23 ct
- Shape
- Princess
- Cut grade
- Not given for this shape
- Color
- F
- Clarity
- VS2
- Measurements
- 5.96 × 5.76 × 4.06 mm
- Table
- 76%
- Total depth
- 70.5%
- Crown angle
- Not given for this shape
- Pavilion angle
- Not given for this shape
- Polish
- Excellent
- Symmetry
- Very Good
- Girdle
- Slightly thick
- Culet
- Pointed
- Fluorescence
- None