Are viruses considered nonliving because they're are not made of protein

No. Firstly, viruses do contain protein capsids, in which DNA or RNA is contained.

To answer your question, viruses are considered non-living, because the only characteristic they exhibit, usual to the living organism, is multiplication. And that's about it. They cannot breathe, eat and so on. 

Calcinosis is the diagnostic term that means an abnormal buildup of calcium on the kneecap (patellar) surface. it is a term uses to describe a group of disorders in which calcium deposits form in the skin. it is also referred to the abnormal deposit of calcium phosphate.