T/HJZB 002-2017 Active Group standards

T/HJZB 002-2017 CVD Synthetic Diamonds Appraisal and Grading

T/HJZB 002-2017

Publish Date: 2017-05-28 Implement Date: 2017-06-18 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: T/HJZB 002-2017

Standard Type: Group standards

Standard Status: Active

is_force_gb: no

CCS Name: Decorative arts and crafts

ICS Name: Jewelry

Publish Date: 2017-05-28

Implement Date: 2017-06-18

Scope

Scope: This standard specifies the terms and definitions, instruments, identification characteristics, identification methods, grading, and result reports for unmounted and mounted polished CVD synthetic diamonds. The identification in this standard applies to colorless to light yellow (grey, brown) series of CVD synthetic diamonds (including rough stones and polished diamonds). The color grading in this standard applies to unmounted and mounted polished diamonds in the colorless to light yellow (grey, brown) series. The cut grading in this standard applies to unmounted and mounted polished CVD synthetic diamonds with a standard round cut. The grading rules in this standard apply to CVD synthetic diamonds that have not undergone optimization treatment and those that have undergone high-temperature and high-pressure treatment. The grading rules in this standard apply to unmounted diamonds with a weight of 0.0400g (0.20ct) or more. Main technical content: Terms and definitions, instruments, identification characteristics, identification methods, grading, and result reports for unmounted and mounted polished CVD synthetic diamonds.