Grading

There is no universal clarity/color grading standard for colored gemstones.

GIA Type 1 Clarity Chart

VVS Very Very Slightly Included – Minute to not detectable
VS Very Slightly Included – minor
SI1 Slightly Included – NOTICEABLE to obvious
SI2 Slightly Included 2 – OBVIOUS to noticeable
I1 Included 1 – Prominent – moderate effect on appearance or durability
I2 Included 2 – Prominent – severe effect on appearance & durability
I3 Included 3 – Prominent – severe effect on beauty, transparency & durability
Type 1 Gemstones are gemstones that are normally found to be clean. This includes gems such as Amethyst, Aquamarine, Blue Topaz, Citrine, Kunzite, Tanzanite, Yellow Beryl, Yellow Chrysoberyl and Diamond.

GIA Type 2 Clarity Chart

VVS Very Very Slightly Included – Minor inclusions
VS Very Slightly Included – NOTICEABLE to Obvious
SI1 Slightly Included – Noticeable to OBVIOUS
SI2 Slightly Included 2 – Obvious to Prominent
I1 Included 1 – Prominent – moderate effect on appearance or durability
I2 Included 2 – Prominent – severe effect on appearance & durability
I3 Included 3 – Prominent – severe effect on beauty, transparency & durability
Type 2 Colored Gemstones by their nature have natural inclusions. (Inclusions are the norm) This includes gems such as Andalusite, Crysoberyl, Alexandrite, Corundum (i.e. Sapphire and Ruby), Garnet, Peridot, Quartz, Amethyst, Citrine, Ametrine, Spinel, Tourmaline and Zircon.

GIA Type 3 Clarity Chart

VVS Very Very Slightly Included – NOTICEABLE to obvious
VS Very Slightly Included – Noticeable to OBVIOUS
SI1 Slightly Included – OBVIOUS to prominent
SI2 Slightly Included 2 – Obvious to PROMINENT
I1 Included 1 – Prominent – considerable effect on appearance or durability
I2 Included 2 – Prominent – severe effect on transparency or durability
I3 Included 3 – Prominent – severe effect on beauty, transparency & durability
Type 3 Colored Gemstones by their nature have many natural inclusions. (Heavily Included is the norm) This includes gems such as Emerald, Beryl, Rubellite, and Tourmaline.A rather nice guide for buying gemstones can be found online on the G.I.A. website, Click on this link to read How to Buy a Gemstone
AGTA Member
AGTA members believe in more than just selling the world's highest quality gemstones and cultured pearls. They share a mine-to-market mentality-the belief that the gem trade should be as transparent and ethical as possible.
That's why, in 1984, the AGTA and its members developed the industry's strictest and most comprehensive Code of Ethics and Fair Business Practices. Every year since then, the AGTA and its members annually commit to leading the industry in standards of disclosure, transparency, and ethical practices.
The AGTA and its members take pride in working toward a gem industry that benefits everyone involved. Whether it's investing in the communities that produce gemstones, supporting individuals whose lives have been impacted by the gem trade, or cooperating with foreign governments to improve working conditions, AGTA members continually work to hold the gem industry to the highest possible business standards.
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GIA
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