Gem FAQS > What Is A Gemstone and About Grading and Classifying Gemstones > Clarity Gradings
Clarity is the easiest grading aspect of a gemstone but usually the most misunderstood. Inclusions are not flaws unless they materially affect the beauty or durability of a gemstone. Inclusions are important in that they allow us to determine where a gem is from and if it is natural and has been treated by man in some way.
Inclusions are what makes a star sapphire in that the star is formed by light striking the tiny rutile needles. These same rutile needles will also tell us if a sapphire has been heated; unbroken needles mean no treatment.
Gemstones are loosely grouped in to three clarity types by GIA based upon how they are commonly found.
Type I- Usually found inclusion free like diamonds-
Type II- Usually found eye-clean like sapphire and ruby.
Type III- Usually included to the naked eye like jadeite.
Last updated on June 14, 2009 by Francis M Lynch