24-9-2020
Worldwide federation of national standards bodies International Organization for Standardization (ISO) has published a 55-page diamond grading standard document, ISO 24016, clarifying definition on diamond terminologies, characteristics and treatments.
ISO 24016 applies to natural, unmounted, polished diamonds of more than 0.25 carats.It does not apply to fancy coloured diamonds, synthetic diamonds, diamonds treated by methods other than laser drilling, nor to assembled stones.
Three major terminologies include diamond, treated diamond and synthetic diamond/ laboratory-grown diamond/ laboratory-created diamond. It noted that the denomination “diamond” without further specification always implies “natural diamond”, which formed completely by nature without human intervention.
The World Jewellery Confederation (CIBJO)welcomes the update. “For the first time, a strictly defined diamond grading system has been ratified by the world’s leading standards body, formally recognising principles and terminology that, to date, had not been approved by any impartial and international authority,” commented CIBJO president Gaetano Cavalieri. According to Gaetano, the ISO 24016 echos the CIBJO Diamond Blue Book.
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