The output of Yellowstone in crow's skin field is very small, and one gram of crow's skin field is yellow and nine taels of gold, which is favored by collectors. It belongs to Shoushan Stone, one of the traditional "four famous stones" in China. Crow skin Tian Huang, also known as black skin field, is Tian Huangshi covered with a layer of black skin. Crow skin Tian Huang is covered with slightly transparent and black stone skin. Produced in the upper, middle and lower branches. You can see a single layer of crow skin through the lamp, and its muscles are easy to identify. If there is one or two layers of yellow or white skin in the crow's skin, it is difficult to identify it under the light. However, this kind of field stone with multi-layer stone skin, if the skin is fine, free of mottled color and sand spots, is more likely to see its good color quality, especially frozen stone, which is a rare material. The black area is full of stones, which is rare. This work is extremely rare, with distinct skin and flesh, full of charm, and can be called top grade, which is the focus of this jewelry exhibition.

Shoushan Stone Field Huangshi, referred to as "Tianhuang" for short, is a rare variety of Shoushan Stone, which is called "soft gem" and "soft gold" in China. This kind of Tian Huangshi is only found in the sand layer under the narrow paddy fields thousands of meters on both sides of Shoushan River in the world. It is a high-quality natural stone with "no roots" and "no veins" and is not produced anywhere else. And after hundreds of years of mining, it is now extinct, so it is very precious.

Tian Huangshi is known as the "King of Stone" and "Emperor of Stone" because of its unique origin, warm and greasy materials, delicate texture and palace supplies in ancient times, and has been loved by collectors of all ages. So far, the value is priceless. Folk sayings such as "gold is easy to get, Tian Huang is hard to find" and "one or two fields of gold, three or two pieces of gold" also highlight Tian Huang's distinguished position and even cast a mysterious color on Tian Huang.

Shoushan Furong Stone is also known as Bai Furong and Baishou Mountain. The top-grade hibiscus stone is natural and beautiful, elegant, slightly transparent, jade-like, and feels particularly good. The ancients praised the hibiscus stone: "Precious is the coffin of Jingshan and the seed of Lantian; Cleanliness is the snow in Liangyuan and the cloud of geese; Gentleness is the skin of a swallow and the body of a jade ring. " This work "Bo Gu Natural Seal" is the work of Fujian arts and crafts artist Zhang, and is known as "a masterpiece".