It is a light blue natural mineral, mostly carved into stone pillars, produced in Shangrao, Jiangxi. In the past, it was used to prepare various green glazes, especially Longquan glazes, so it was commonly known as Longquan stone.

Pearl:

Pearl material is a kind of ceramic blue and white material. Calcined from natural cobalt clay ore, it is the main coloring raw material of blue and white. Yunnan, Fujian, Jiangxi and other provinces have production.

One of the blue and white porcelain materials. Calcined from natural cobalt clay ore, it is the main coloring raw material of blue and white. Yunnan, Fujian, Jiangxi and other provinces have production. Liu Bingcheng evaluated several kinds of green materials recorded in Tiangong Kaiwu: "Anonymous" ..... sometimes refers to cobalt clay minerals (minerals in which cobalt and manganese dioxide coexist). Because cobalt can appear cyan, it is made into blue and white material on porcelain. "Huiqing" here refers to some cobalt-containing minerals used as blue and white materials on ceramics. The pronunciation of "mysterious green is Su Bo Ni Qing" in China Gao Kang's Eight Tones of Respect for Life seems to be similar to that of Asbolite. At the beginning of the Ming Dynasty, western languages used China's porcelain-making technology for reference to produce blue-and-white porcelain, which was called "Arabian Blue Porcelain". Therefore, western blue and white materials, cobalt flowers or some kind of cobalt-containing blue glass (Smalt) or even the hard-working skills of painting flowers on porcelain blanks with cobalt materials may also generate communication through some channels. In the16th century, cobalt-bearing ores in German deposits were used by western languages to make blue glass Smalt. At the same time, the pronunciation of Smalt is similar to that of Ma Su Li Qing recorded in ancient books. In China, domestic cobalt minerals are produced better in Xuanwei, Huize and Chenggong, Yunnan, and are used to being called pearls. Generally speaking, a good blue and white is an appropriate combination of elements such as cobalt, manganese and aluminum. The manganese content of domestic cobalt-bearing soil minerals is high, while that of foreign cobalt-bearing soil minerals is relatively low. After processing, pearl material can be made into blue and white material, which can not only be well colored, but also avoid all kinds of defects.

Zijintu-named after its purple color, is a kind of clay with high iron content. Zijintu is an important raw material for preparing celadon tires with black tires in Ge Kiln, Guan Kiln and Longquan in Song Dynasty, and it is also an important raw material for preparing sauce glaze and imitation Longquan series celadon glaze in Jingdezhen in Ming and Qing Dynasties.

Zijintu is a kind of red clod containing iron, which is named after the preparation of Zijin glaze (in fact, it is a light brown glaze). It can be seen almost everywhere in Leigong Mountain and suburban slopes in Jingdezhen City. Generally, purple clay contains about 6%-7% iron oxide after elutriation and slag removal, which can be used to prepare traditional colored glazes such as Holly, Azure, Pink, Longquan, Zijin, Wujin and tea powder.

Because of my limited ability, I can only analyze these for my friends. Hope to forgive me!