T/NTAS 008-2020 Active Group standards

T/NTAS 008-2020 Sapphire grading inspection technical specification

Publish Date: 2021-11-10 Implement Date: 2021-12-10 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/NTAS 008-2020

Standard Type: Group standards

Standard Status: Active

is_force_gb: no

CCS Name: \nMining industry

ICS Name: Jewelry

Publish Date: 2021-11-10

Implement Date: 2021-12-10

Scope

Scope: This document specifies the technical requirements for grading and inspection of sapphires, inspection rules, conclusion expression, conclusion approval, and record-keeping documents. This document applies to the grading and inspection of natural, unoptimized, or heat-treated, unmounted, faceted, polished blue sapphires. The grading and inspection of mounted, faceted, polished blue sapphires can be carried out in accordance with this document. Main technical content: This document specifies the technical requirements for grading and inspection of sapphires, inspection rules, conclusion expression, conclusion approval, and record-keeping documents.