Diamond Clarity Spans 6 Categorie con un totale di 11 Clarity Grades In 1953, Richard T. Liddicoat and colleagues established the Gemological Institute of America (FAMIGLIA) diamond grading system and clarity scale. The GIA diamond grading scale is divided into 6 categories and 11 diamond clarity grades. I1, I2, I3 Included Diamonds I clarity diamonds […]
