| Clarity Term |
Meaning |
| FL = flawless |
no inclusions |
| EY = eye clean |
inclusion(s) visible only under 10X magnification |
| VSI = very slightly included |
tiny inclusion(s) well hidden or not readily visible |
| SI = slightly included |
hidden inclusion(s) not readily visible |
| VLI = very lightly included |
minor inclusion(s) barely discernible with the naked eye |
| LI = lightly included |
minor inclusion(s) that can be seen with the naked eye, but does not (do not) effect beauty or durability |
| MI = moderately included |
readily visible inclusions |
| HI = heavily included |
no clean areas, usually offered only in extremely rare materials |