GIA CLARITY TYPES

Type I
Usually eye clean		 Type II
Usually included		 Type III
Almost always included
Aquamarine
Chrysoberyl, yellow and green
Heliodore
Morganite
Quartz, smoky
Spodumene, all
Tanzanite
Tourmaline, green
Zircon, blue		 Andalusite
Alexandrite
Corundum, all
Garnet, all
Iolite
Peridot
Quartz, amethyst, citrine, ametrine
Spinel, all
Tourmaline, all but green, red and watermelon
Zircon, all but blue		 Emerald, Red Beryl,
Tourmaline: red and watermelon

GIA 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