The Carat Standard

IGI report LG783636236

3.00 ct Asscher Laboratory-Grown Diamond

90/100 · Refined

A strong candidate on paper; confirm its light pattern in imagery.

What reads well

  • A 1.01:1 length-to-width ratio sits in the classic Asscher / square emerald range.
  • Face-up spread (7.95 × 7.85 mm) is typical or better for a 3.00 ct Asscher / square emerald.
  • Table 63% and depth 68.2% fall in the typical Asscher / square emerald range.
  • Excellent polish and symmetry, the top finish grades.
  • F color is in the colorless range.

What deserves a closer look

  • Screening only: for this Asscher / square emerald, check images or video of the exact stone for the concentric "hall of mirrors", the windmill pattern at the corners and any see-through window.
  • 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 63%, the table sits within the typical 58–68% range for an Asscher / square emerald, balancing brightness with fire.
Total depth · Ideal
68.2% is within the typical 60–70% range for an Asscher / square emerald, keeping weight where it contributes to face-up size and light return.
Length-to-width · Ideal
A 1.01:1 outline is within the classic 1–1.05:1 range for an Asscher / square emerald.
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: 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
VS1 is typically eye-clean, though step cuts show inclusions more readily — worth a close look at the images.
Fluorescence · Ideal
None: no meaningful effect on appearance.

What to check on the exact stone

  • With open step facets, is the center completely eye-clean without any visible dark marks?
  • 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
3.00 ct
Shape
Asscher
Color
F
Clarity
VS1
Cut
Not stated
Measurements
7.95 × 7.85 × 5.35 mm
Table
63%
Depth
68.2%
Crown angle
Not stated
Pavilion angle
Not stated
Girdle
Medium
Culet
Pointed
Polish
Excellent
Symmetry
Excellent
Fluorescence
None

About The Carat Standard Score

How The Carat Standard reads a report