2, jade is fragile, it is recommended to wrap several layers. Because if the plane encounters some airflow that affects the flight, it will be bumpy and unstable, and it can be avoided if it is equipped with several buffer layers. Jade is a mineral. There are two kinds of jade: soft and hard. Usually, jade refers to nephrite. It belongs to one of the most common jewels. Jade in a broad sense includes not only Hetian jade and jadeite, but also chalcedony, xiuyan jade, Nanyang jade, crystal, agate, amber, coral, turquoise, lapis lazuli, Huanglong jade and other traditional jade. Modern mineralogy divides jade into jadeite and nephrite. Jade is jadeite, while nephrite mainly refers to Hetian jade in Xinjiang, which is a narrow definition of "jade". The hardness of jade is one of the important criteria for identifying jade, and the luster of gem is also the basic criterion for identifying the authenticity and grade of gem.
Generally speaking, the luster of gems can be simply divided into bright light, burning light, flashing light and weak light. But light is the strongest brightness, and people must squint. For example, the polished diamond total reflection surface has such brightness; Burning brightness is also very high, dazzling and high-hardness gems generally have burning brightness after polishing; Flash is the brightness of ordinary glass, which is divided into strong flash and weak flash. Jade with high hardness is generally strong flash, while jade with low hardness is weak flash. However, the light intensity of the stone surface with lower hardness is weak after polishing.