Distributed in Danfeng County, Shaanxi Province. The main component tremolite-actinolite is green-dark green. The relative density is 2.95-2.97, and the refractive index is 1.6 1, which is inert under short-wave ultraviolet fluorescent lamps. Using polarizing microscope, it can be seen that tremolite is distributed among columnar tremolite in fiber interwoven, bundle and radial manner, with fiber-columnar crystal structure.

2. Opal

Located in Babaotai, Yangxian County, it is milky white, slightly transparent, with glass-to-grease luster and conchoidal fracture, with delicate structure and crisp nature.

3.turquoise

Distributed in Baihe, Ankang, Pingli and other places; Yueertan in Baihe County occupies an important position in the international market both in history and today. It is one of the world-famous turquoise producing areas, with light blue to blue-green, compact structure, high hardness, opacity and waxy luster, conchoidal fracture.

4. lavender jade

Distributed in Shangnan, Zhouzhi, Feng Dan and Zhen 'an counties. Fine lepidolite-based mineral aggregate. Light rose red to purple red, tiny flicker can be seen on the polished surface, pearl luster, slightly transparent to opaque.

5, chalcedony

Distributed in Luonan, Xiaoqinling, Zhen 'an and Zhashui. The original stone is massive and nest-shaped, with dense and delicate structure, conchoidal fracture, gray, and sometimes grayish green and grayish brown. Pink or grayish green with microcrystalline structure has better quality. The carnelian is lenticular, brick red, with no pattern, waxy luster and opacity, and can be used for jade carving.