T/JSAS 028-2022 Active

Scope: This document specifies the product grade, processing procedures, inspection methods, inspection rules, and requirements for packaging and transportation of white crystal bracelets. This document is applicable to the production of white crystal bracelets. Main technical content: 3.1 Crystal Crystal is mainly composed of quartz minerals, with a chemical composition of silicon dioxide (which may contain a small amount of titanium, iron, aluminum, etc.) and is a mineral crystalline body with artistic value. Optical characteristics: Single refractive index, Mohs hardness 7, density 2.66 (+0.03, -0.02) g/cm3, refractive index 1.544–1.553, and birefringence 0.009. (The above content is quoted from GB/T 16553 "Jade and Gemstone Identification") 3.2 Crystal Bracelet Crystal bracelets are made from natural crystals and are beaded crystal products processed by mechanical and manual methods such as cutting, polishing, and buffing. They are typically worn on the hand or wrist. 3.3 White Crystal Bracelet White crystal bracelets are made from natural white (or colorless) crystals and are beaded crystal products processed by mechanical and manual methods such as cutting, polishing, and buffing. They are typically worn on the hand or wrist.