Gold mineral found in MI Septarian (Lightning Stone)

[Rattlehead]

I found a ton of septarians today in Lake Michigan just south of Saugatuck. One unusual one had super sparkly gold next to the calcite that ran through the whole thing. It was a break from a larger piece. The pictures don't do it justice to how sparkly it it. I imagine it is pyrite...any other ideas?

 

[Brian T. Booth]

I found a ton of septarians today in Lake Michigan just south of Saugatuck. One unusual one had super sparkly gold next to the calcite that ran through the whole thing. It was a break from a larger piece. The pictures don't do it justice to how sparkly it it. I imagine it is pyrite...any other ideas?

Pyrite

 

[megnpat]

very nice piece of pyrite collectable for sure my grandfather was a big rock hound couldnt go anywhere without spending hours diggin up rocks i loved that man for he taught me a great many things about life and how to treat people and he would have definately bought that out of a rack shop if he saw it or kept it if he found it