Please translate the following passage into English:

Stone in qingtian county, Zhejiang Province

Qingtian Stone, mainly produced in qingtian county, Zhejiang Province, is one of the traditional "Four Yin Zhangshi" in China. Qingtian stone is a metamorphic intermediate-acid volcanic rock, and its main mineral is pyrophyllite. More than 65,438+0,700 years ago, it became a stone for folk artists to make handicrafts. Qingtian Stone, together with colored stones such as Shoushan Stone, Feldspar Stone and Balin Stone, * * * carries the seal art of China with profound cultural accumulation. Solid and delicate texture, rich colors and strange patterns are ideal materials for carving and seal cutting.

Reference translation

stone from Qingtian County in Zhejiang Province

Qingtian Stone, mainly produced in qingtian county, Zhejiang Province, is one of the "four traditional Yin Zhangshi" in China. Qingtian stone is a metamorphic intermediate-acid volcanic rock, which is mainly composed of pyrophyllite. As stone materials for carving handicrafts by folk artists since 1700 years ago, Qingtian stone, Shoushan stone, Changshi stone, Balin stone and other colored stones all bear the cultural accumulation of China seal art. Qingtian stone is an ideal material for carving and carving because of its solid and delicate texture, rich colors and strange patterns.