Fluorapatite with Pyrite

From my observations it is clear that pyrite (iron)  is attracted to fluorapatite. I’ll leave it to a geo-chemist to reveal which ions form the attraction. This unique piece has a .5cm coated fluorapatite with a pyrite stuck to the front center. The other, smaller apatites also have pyrites.  .

Locality: Foote Lithium Company Mine, Kings Mountain, Cleveland County, North Carolina

Composition: calcium fluorophosphate and iron sulfide with Mn2+3(PO4)2·4H2O