T/GAC 2-2019 Active Group standards

T/GAC 2-2019 Diamond Cut Eight Heart and Eight Arrow Effect: Grading and Inspection

Publish Date: 2019-07-10 Implement Date: 2019-08-06 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/GAC 2-2019

Standard Type: Group standards

Standard Status: Active

is_force_gb: no

CCS Name: Other non-metallic minerals

ICS Name: Jewelry

Publish Date: 2019-07-10

Implement Date: 2019-08-06

Scope

Main technical content: This standard specifies the terms and definitions of the heart-and-arrow effect in diamond cutting (hereinafter referred to as the "heart-and-arrow effect"), the eight-heart-and-eight-arrow effect in diamond cutting (hereinafter referred to as the "eight-heart-and-eight-arrow effect"), and the inspection, grading, and representation methods of the eight-heart-and-eight-arrow effect. This standard applies to unmounted standard round-cut diamonds with a weight of not less than 0.0400g (0.20ct) and a color ranging from colorless to light yellow. For diamonds with a weight of less than 0.0400g (0.20ct), this standard can be used as a reference for implementation.