The Carat Standard

IGI report LG787624935

3.00 ct Old European Laboratory-Grown Diamond

86/100 · Refined

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

What reads well

  • Face-up spread (8.90 × 8.99 mm) is typical or better for a 3.00 ct Old European cut.
  • Table 49% and depth 64.4% fall in the typical Old European cut range.
  • Excellent polish and symmetry, the top finish grades.
  • VS1 clarity is typically eye-clean in an Old European cut.
  • No fluorescence: no haze risk to weigh.

What deserves a closer look

  • J color in a 3.00 ct Old European cut may show some warmth, especially at the culet.
  • Screening only: for this Old European cut, check images or video of the exact stone for the broad, chunky antique flash pattern and how the open culet looks face-up.
  • 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 49%, the table sits within the typical 45–56% range for an Old European cut, balancing brightness with fire.
Total depth · Ideal
64.4% is within the typical 57–66% range for an Old European cut, keeping weight where it contributes to face-up size and light return.
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
Slightly Thick To Thick (Faceted): a durable girdle thickness that doesn't hide meaningful weight.
Culet · Ideal
Large: the open culet traditional to an Old European cut, seen face-up as a small circle at the center and part of its antique character.
Color · Favorable
J may show slight warmth, especially next to white metal. Yellow or rose gold tends to complement it.
Clarity · Favorable
VS1 is typically eye-clean.
Fluorescence · Ideal
None: no meaningful effect on appearance.

What to check on the exact stone

  • Does it show the broad, chunky flashes of an antique cut, and how much does the open culet show face-up?
  • 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
Old European
Color
J
Clarity
VS1
Cut
Not stated
Measurements
8.90–8.99 × 5.77 mm
Table
49%
Depth
64.4%
Crown angle
35.4°
Pavilion angle
40.9°
Girdle
Slightly thick to thick (faceted)
Culet
Large
Polish
Excellent
Symmetry
Excellent
Fluorescence
None

About The Carat Standard Score

How The Carat Standard reads a report