You can find this artifact near the anomaly Whirligig. It is quite an ugly reddish object made out of pressed together and curiously bent polymerized remnants of plants, soil, and bones. Quite widespread and not very effective. - In-game description
The Stone Blood increases health regeneration by 200%, at the cost of decreasing overall hit protection by 10%. Considering these drawbacks, it is overall ineffective and best sold than used.
A reddish formation of compressed and fossilized plants, soil and animal debris. Can partially neutralize chemical poisons. Emits radiation. - In-game description
The Stone Blood in S.T.A.L.K.E.R.: Call of Pripyat gives a +3 chemical protection bonus, while having a +1 radiation downside. The player could exploit the Stone Blood's abundance to easily give themselves higher protection against chemical strikes.