1, Yanyuan Agate: Yanyuan County, Liangshan Prefecture, Sichuan Province.

2. Tourmaline: Guangxi, Yunnan, Inner Mongolia, Jiangxi and Hebei.

Second, the shape and color characteristics are different.

1, Yanyuan agate: It is called "Colorful South Red" because it has one or more colors such as toner, purple, green, white, cyan, yellow and brown, and its origin is adjacent to that of Sichuan South Red.

2. Tourmaline: round triangular columnar crystals or complex triangular conical columnar crystals. Tourmaline with longitudinal texture on the crystal face is complex in composition and color. The international jewelry industry basically divides tourmaline into commercial varieties according to color. The brighter the color, the higher the value.

Third, the nature and characteristics are different.

1, Yanyuan agate: Yanyuan agate is a kind of tough agate with fine texture, high oiliness and high density in jade.

2. Tourmaline: There will be characteristic growth stripes parallel to the extension direction of columnar crystals on the crystal surface. In cross section, it is a curved spherical triangle.