Altered ? Stone Pendant

The beads are red jasper if not wrong.
The pendant looks like serpentine to me. If you rub a cotton swab on the side crack, a red residue is left. So, I guess those veins are not natural but maybe some kind of pigment, vermillion/cinnabar maybe, was used. Any idea how was that achieved?

 

Heat cracked and dyed.

 

Dyed for sure. They were trying to make it look like jade.