Most bloodstone hardness is not high. For example, the Mohs hardness of Changhua bloodstone is 2~3, so it is often used as a material for seals and craft carvings.
Bloodstone is a unique gem in China, with the largest output in Changhua, Zhejiang Province and the earliest discovery, so it is also called Changhua Bloodstone. However, bahrain bloodstone in Bahrain Right Banner, Chifeng, Inner Mongolia, and bloodstone were discovered in Shaanxi, Gansu, Sichuan, Hunan and Yunnan.
Bloodstone is bright red as chicken blood and crystal clear as jade. It is a unique gem in China and is well-known at home and abroad as a "national treasure".
The main mineral components of bloodstone are Cinnabar, kaolinite, etc. Under the long-term geographical effect, Cinnabar gradually infiltrated kaolinite and pyrophyllite.
Or stone formed after the ground is opened. Because Cinnabar is bright in color and red as chicken blood, it is named Chicken Blood Stone.
The quality of bloodstone is determined by the richness of blood color, the amount of blood volume, the state of blood shape, aggregation and dispersion, thickness and so on. Blood volume less than 10% is average, less than 30% is medium-grade, more than 50% is rare, and more than 70% is very precious and rare. It is called "Dahongpao", and whole blood or six-sided blood is the best.
The output of bloodstone is small, so its value is high. Now the price of top-grade texture can reach several hundred yuan or even thousands of yuan per gram.