Clarity Grading System (GIA)

 

Below is the grading system that we use in evaluating the clarity of our rough and cut stones.  This is the GIA Clarity Grading System.  Note that clarity grades vary somewhat based upon the type of gemstone being evaluated.  Please do not hesitate to contact us if you have any questions.

 

Type I Clarity

VVS:   Very, Very Slightly Included (the best) – Minute inclusions that are difficult to see using 10X, and are not visible at all to the naked eye.

VS:      Very Slightly Included – Minor inclusions that are easier to see using 10X, but still not visible to the naked eye.

SI1:     Slightly Included 1 – The inclusions are easily seen using 10X, and are noticeable with the naked eye.

SI2:     Slightly Included 2 – The inclusions are more easily seen using 10X, and are quite visible with the naked eye.

I1:        Included 1 – The inclusions are very obvious and they have a moderate negative effect on the over-all appearance or durability of the gemstone.

I2:        Included 2 – The inclusions are very obvious and they have a severe negative effect on the over-all appearance or durability of the gemstone.

I3:        Included 3 – The inclusions are very obvious and they have a severe negative effect on both the over-all appearance and durability of the gemstone.

 

Type I Gemstones

Beryl:                    Aquamarine, Green, Morganite (Pink), Yellow
Chrysoberyl:       Green, Yellow
Quartz:                 Smokey
Spodumene:       Kunzite, Green
Topaz:                  Blue, Yellow, Orange, Pink, Red
Tourmaline:        Green
Zircon:                 Blue
Zoisite:                Tanzanite

…………………………………………………………………………………………………………………………………………………………………………………………………. 

 

Type II Clarity

VVS:   Very, Very Slightly Included (the best) – Minor inclusions that are somewhat easy to see using 10X, but still not visible to the naked eye.

VS:      Very Slightly Included – Noticeable inclusions that are easier to see using 10X, and may be slightly visible to the naked eye.

SI1:     Slightly Included 1 – The inclusions are easily seen using 10X and are large or numerous, and are noticeable with the naked eye.

SI2:     Slightly Included 2 – The inclusions are easily seen using 10X and are large or numerous, and are very noticeable with the naked eye.

I1:        Included 1 – The inclusions are very obvious and they have a moderate negative effect on the over-all appearance or durability of the gemstone.

I2:        Included 2 – The inclusions are very obvious and they have a severe negative effect on the over-all appearance or durability of the gemstone.

I3:        Included 3 – The inclusions are very obvious and they have a severe negative effect on both the over-all appearance and durability of the gemstone.

 

Type II Gemstones

Andalusite:          All
Chrysoberyl:       Alexandrite
Corundum:          All colors (i.e. Sapphire and Ruby)
Garnet:                 All species and colors
Iolite:                     All
Peridot:                All
Quartz:                 Amethyst, Citrine, Ametrine
Spinel:                  All
Tourmaline:        Blue, Orange, Yellow, Multi-colored (except Watermelon color)
Zircon:                 Green, Orange, Red, Yellow

…………………………………………………………………………………………………………………………………………………………………………………………………. 

 

Type III Clarity

VVS:   Very, Very Slightly Included (the best) Noticeable inclusions that are easy to see using 10X, but usually not visible to the naked eye.

VS:      Very Slightly Included Obvious inclusions that are easy to see using 10X, and usually visible to the naked eye.

SI1:     Slightly Included I The inclusions are large and numerous using 10X, and prominent with the naked eye.

SI2:     Slightly Included 2 The inclusions are large and numerous using 10X, and very prominent with the naked eye.

I1:        Included 1 The inclusions are very obvious and they have a moderate negative effect on the over-all appearance or durability of the gemstone.

I2:        Included 2 The inclusions are very obvious and they have a severe negative effect on the over-all appearance or durability of the gemstone.

I3:        Included 3 The inclusions are very obvious and they have a severe negative effect on both the over-all appearance and durability of the gemstone.

 

Type III Gemstones

Beryl:                    Emerald
Tourmaline:         Red, Pink, Watermelon (Green transitioning to Pink or Red)