IGI report LG788614068
1.37 ct Oval Laboratory-Grown Diamond
89/100 · Refined
A strong candidate on paper; confirm its light pattern in imagery.
What reads well
- A 1.44:1 length-to-width ratio sits in the classic oval range.
- Face-up spread (9.24 × 6.42 mm) is typical or better for a 1.37 ct oval.
- D color is in the colorless range.
- VS1 clarity is typically eye-clean in an oval.
- No fluorescence: no haze risk to weigh.
What deserves a closer look
- Screening only: for this oval, check images or video of the exact stone for the bow-tie (a dark band across the centre) and whether both ends look even.
- 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 · Ideal
- At 61%, the table sits within the typical 53–63% range for an oval, balancing brightness with fire.
- Total depth · Closer look
- 57.8% is shallower than typical for an oval (58–63.5%). That spreads the stone face-up but raises the risk of windowing — a glassy, see-through center.
- Length-to-width · Ideal
- A 1.44:1 outline is within the classic 1.3–1.5:1 range for an oval.
- 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 · Ideal
- Medium To Slightly Thick (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 · Favorable
- VS1 is typically eye-clean.
- Fluorescence · Ideal
- None: no meaningful effect on appearance.
What to check on the exact stone
- With a shallow 57.8% depth, can you see a glassy, see-through patch in the center?
- In a face-up video, does the bow-tie flicker as the stone tilts, or stay a fixed dark band across the center?
- 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
- 1.37 ct
- Shape
- Oval
- Color
- D
- Clarity
- VS1
- Cut
- Not stated
- Measurements
- 9.24 × 6.42 × 3.71 mm
- Table
- 61%
- Depth
- 57.8%
- Crown angle
- Not stated
- Pavilion angle
- Not stated
- Girdle
- Medium to slightly thick (faceted)
- Culet
- Pointed
- Polish
- Very Good
- Symmetry
- Very Good
- Fluorescence
- None