T/JSAS 026-2022 Active

Scope: This document specifies the product grade, processing procedures, inspection methods, inspection rules, and packaging and transportation requirements for white crystal balls. This document is applicable to the production of white crystal balls. Main technical content: 3.1 Crystal Crystal is mainly composed of quartz minerals, with a chemical composition of silicon dioxide (which may contain small amounts of titanium, iron, aluminum, etc.), and is a mineral crystal with artistic value. Optical characteristics: - Uniaxial positive opticality - Mohs hardness: 7 - Density: 2.66 (+0.03, -0.02) g/cm3 - Refractive index: 1.544–1.553 - Birefringence: 0.009 (The above content is quoted from GB/T 16553 "Jade and Gemstone Identification") 3.2 Crystal Ball Crystal balls are made from natural crystals and are spherical crystal products manufactured through mechanical and manual processing such as cutting, polishing, and finishing. 3.3 White Crystal Ball White crystal balls are made from natural white (or colorless) crystals and are spherical crystal products manufactured through mechanical and manual processing such as cutting, polishing, and finishing.