Diamond Details
IGIIGI certified 
4.21 Carat Round Lab Diamond
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Certification & Report
Cut: Rare Carat Ideal
You’ve selected a 4.21 carat round lab diamond. 0% of our users choose round diamonds. Learn more about them here.
Cut is the most important factor. When an experienced gemologist picks up a diamond grading report, their eyes go to very specific values. They are looking to see if these fall within the desired ranges. Seemingly unimportant values like the depth percentage have a large effect on how your diamond will sparkle - and these values differ for each shape.
Follow the checklist prepared by our gemologists to see how your diamond fares. If it misses by a little bit on one or two, that’s fine, but we recommend trying to find a stone that passes on all:
| Property | Target | Diamond |
|---|---|---|
Cut | Excellent | Ideal |
Symmetry | Very Good or better | Excellent |
Polish | Very Good or better | Excellent |
Girdle Percentage | 2.5% - 4% | 4.0% |
Girdle Thickness | Thin to Thick | M. Thick |
Table | 54% - 60% | 58.0% |
Depth | 59% - 63% | 61.7% |
Crown Angle | 33° - 35° | 35.5° |
Color: D
Your 4.21 carat round lab diamond is graded D color (Colorless), and you can read more about D color diamonds here.
Color is graded beginning with D (Colorless). Learn more about diamond color here. The market prices colorless diamonds higher as they are rarer, but some people prefer warmer colored stones.
Our gemologists check for following color issues before recommending a diamond:
| Property | Target | Diamond |
|---|---|---|
Color | K-D | D |
Artificial Treatment | No | No |
Fluorescence Color | None or Blue | None |
Fluorescence Strength | Faint or less | None |
Clarity: VS2
Your 4.21 carat round lab diamond is graded VS2 clarity, which stands for Very Slightly Included 2. Read more about VS2 clarity diamonds here, or learn more about diamond clarity in general here.
There are minimum clarities our gemologists prefer for each shape, but beyond that clarity is a matter of budget and preference. People typically aim for an eye clean stone. Also, our gemologists have certain deal-breakers when it comes to clarity. For example, our gemologists always avoid stones with a cavity, because with one wrong hit your diamond can crack.
Use the checklist below to ensure your diamond passes. Consult us before purchasing to see if any other nuanced issues are present:
| Property | Target | Diamond |
|---|---|---|
Clarity | SI2 or above | VS2 |
Cavity | No | No |
Chip | No | No |
Knot | No | No |
Laser Hole | No | No |
Etch Channel | No | No |
Patch | No | No |
Diamond Size: 4.21 Carat
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