Whats happened to my Fina? Use it or not..

[gettin swolle]

Hey bros,
Ive received fina from a bud of mine who said he used the same batch. Ive got stuff from him b4, so I dont think hes BS me. When I ask him about the particles, he just says dont worry about it, Ive used it. Ive searched high and low on this forum, but the conclusion is, some say just use it, while others say dont. I dont know if it came "out of solution" or oxidized. I dont know what the difference is. But their are particles in it, tiny dark bits. As in the first 2 pics. The 3rd shows it when I shook it up.
Help me out here please.. Is it ok or not..
IF it is, should I shake it up or just let the partilces go to the bottom and use the clearer liquid on top?





thanks!!!
Peace-