There are 122 varieties of jade? Jade can be categorized into two main types, one being nephrite and the other being hard jade.

The so-called 'hard jade' mainly refers to the jadeite genus pyroxene, in other words, hard jade basically describes jadeite. Its Mohs hardness is between 6.5 and 7, so it can be said that it is a well-deserved 'hard jade'.

The nephrite is the famous Hetian jade. Of course, the use of 'nephrite' to describe Hetian jade is not to say that it is really soft, but rather a long-used expression. In fact, the hardness of Hetian jade is equally not low, and it is tough, delicate, and its texture is very outstanding.

Jade

China is the earliest and most extensive country in the world to mine and use jade. There are many records in ancient books and various names, such as water jade, relic jade, peyote jade, fragrant jade and soft jade. The tremolite nephrite jade block unearthed at the Chahai site in Fuxin City, Liaoning Province, about 8,000 years old (Early Neolithic), is the earliest real jade artifact known in the world so far.

Jade is one of the more noble of the ores. Jade is rich in a variety of trace elements, such as zinc, iron, copper, manganese, magnesium, cobalt, selenium, chromium, titanium, lithium, calcium, potassium and sodium. The moistness of jade can eliminate the restless heart, the color of jade can delight the bored heart, and the purity of jade can purify the dirty heart. Therefore, a gentleman loves jade and hopes to find the natural aura in jade.

Reference for the above:Baidu Encyclopedia - Jade