For gemstones, when evaluating its quality, it is important that the durability of the gemstone is the same as that of the fat jade. Yangzhiyu has been recognized by human beings since ancient times. Its toughness and durability are characterized by ancient Chinese people and widely used as artifacts, tools and religious sacrifices.
This feature has also been confirmed by modern scientific research: the Mohs hardness of sheep fat jade reaches 6 to 6.5, which is larger than the common hard objects such as steel, glass and ordinary rock. It is not easy to wear in daily life; the toughness of white jade is especially prominent. Its toughness is only lower than that of black diamonds used in the manufacture of advanced turning tools, ranking second in natural minerals.
Therefore, the sheep fat jade looks soft, the inner quality is strong and tough, and it can be used and passed down for a long time. Famous jadeites of all ages, based on the excellent craftsmanship of Yangzhiyu, all of them are the jade white jade of Hetian Yuzhong as the preferred jade for their carving skills.
women jeans
women jeans
GUANGDONG MERICAN INDUSTRIAL CO.,LTD , https://www.gdmerican.com