??? and ??? in Fluorite

This is another sample I found for sale that completely overlooked the inclusions contained within. The fluorite in this sample actually has 2 different inclusions inside, one of them being the obvious crystaline metallic substance, and the other being fine, metallic strands which are barely noticable in the close up. As of now I am uncertain what these inclusions are as none of the mineral inclusions are present in the rest of the sample, but I have a guess that the large inclusions could be sphalerite. The fluorite crystal is about half an inch wide.