| Grade |
Cut |
Clarity |
Color |
| Top |
Excellent |
FL/IF (Flawless): No inclusions or blemishes under 10x magnification. IF (Internally Flawless): No inclusions, only minor surface blemishes |
D (Absolutely Colorless): Rarest and most valuable |
| High |
Very Good |
VVS1 / VVS2 (Very, Very Slightly Included): Extremely tiny inclusions, very hard to see |
E-F Colorless; tiny traces of color, hard to detect. |
| Mid |
Good |
VS1 / VS2 / SI1. VS1, VS2 (Very Slightly Included): Minor inclusions, visible under magnification; SI1, SI2 (Slightly Included): Inclusions visible under magnification, sometimes to the naked eye |
G–J Near-colorless; a slight warmth, often invisible in settings |
| Low |
Fair / Poor |
SI2 / I1–I3 (Included): Obvious inclusions, may affect transparency and brilliance |
K-Z (K-M) Faint yellow or brown; N-Z: Noticeable color (usually yellow or brown), lower value |
