I'm thinking it might be fossil evidence. Hope it helps!
arsenic
Nitrogen group element, any of the chemical elements that constitute Group 15 (Va) of the periodic table. The group consists of nitrogen (N), phosphorus (P), arsenic (As), antimony (Sb), bismuth (Bi), and moscovium (Mc).
Contains and protects the cell
Best Answer: Minerals cannot come from materials that were once a living thing.