The International Organization for Standardization (ISO) has developed a set of international standards for classifying and qualifying polished diamonds.
The recently published ISO 24016 standard aims to establish rules with maximum precision for determining the weight, color, clarity and cut of individual diamonds.
According to ISO, although most diamonds are currently evaluated on the 4Cs standard, there are still some diamond reports issued based on different sets of standards by individual laboratories, so it will potentially leading to different results for the same diamond. “This situation damages the reputation of the entire diamond trade. Therefore, a single set of ISO standards is needed to classify polished diamonds,” ISO said.
ISO has established the terminology, grading and methods used to grade and describe polished diamonds over 0.25 carats.
The new set of standards applies to natural diamonds, polished but not yet mounted in jewelry; and does not apply to synthetic, colored, or diamonds that have been set in jewelry.
ISO notes: “Together with ISO 18323, which sets out the terminology of diamonds, synthetic diamonds and diamond simulants, an ISO standard for grading polished diamonds would provide a reliable basis. trusted in the world diamond industry.
According to the federation, the development of an ISO standard for grading polished diamonds has been advocated by international diamond organizations and CIBJO (World Jewelery Confederation), with the aim of adopting a single standard. for CIBJO diamond grading and diamond terminology.
CIBJO described the ISO 24016 series of standards as a breakthrough development, and affirmed that this is the first standard approved by ISO, clearly defining the terminology, classifications and methods of classifying metals. polished diamond.
CIBJO President Gaetano Cavalieri said: “This is a historic moment for our industry. For the first time, a rigorous diamond grading system has been approved by the world's leading standards organization, officially recognizing principles and terminology that until now have not been adopted by any national authority. Which economy will accept it?