1, the material is precious. Precious jade species such as Hetian jade are more collectible than jadeite such as Xiuyan jade and agate.
2, beautifully made. The more exquisite the workmanship, the better the description, the stronger the artistry and the more collectible it is.
3, well preserved. After a long time, the better the preservation, the more beautiful the appearance, and the more collectible it is.
4. Typical modeling. Decorations and styles have typical chronological characteristics, and the higher the collection value of kuanmen ancient jade.