GIA clarity system
CLARITY TYPES
| Type I Usually eye clean | Type II Usually included | Type III Almost always included |
| Aquamarine, Chrysoberyl, Heliodore, Morganite, Quartz (smoky), Spodumene, Tanzanite, Tourmaline (green), Zircon (blue) | Andalusite, Alexandrite, Corundum (Sapphires, Rubies), Garnet, Iolite, Peridot, Quartz (amethyst, citrine, ametrine), Spinel, Tourmaline (all but green, red/pink and watermelon), Zircon (all but blue) | Emerald, Red Beryl, Tourmaline (red/pink and watermelon) |
CLARITY GRADES
| Type I | Type II | Type III |
VVS | Minute inclusions, difficult to see under 10X. Eye clean. | Minor inclusions, somewhat easy to see with 10X. Usually eye clean. | Noticeable inclusions under 10X. Usually eye clean. |
VS | Minor inclusions, somewhat easy to see with 10X. Usually eye clean. | Noticeable inclusions under 10X. May be eye visible. | Obvious inclusions with 10X. May be eye visible. |
SI1 | Easily noticeable with 10X. Slightly visible to the unaided eye. Usually low relief. | Obvious inclusions, large or numerous under 10X. Apparent to unaided eye. | Prominent to unaided eye. |
SI2 | Easily visible to the unaided eye. Usually low relief. | Obvious inclusions, large or numerous under 10X. Very apparent to unaided eye. | Very prominent to unaided eye. |
I1 | Moderate effect on appearance or durability. | Moderate effect on appearance or durability. | Moderate effect on appearance or durability. |
I2 | Severe effect on appearance or durability. | Severe effect on appearance or durability. | Severe effect on appearance or durability. |
I3 | Severe effect on both appearance and durability. | Severe effect on both appearance and durability. | Severe effect on both appearance and durability. |
Dcl | Not transparent | Not transparent | Not transparent |