Pyrite Pseudo. After Pyrrhotite
Small Cabinet, 7.1 x 6.4 x 3.7 cm
Huanzala Mine, Huallanca District, Dos de Mayo Prov., Huanuco Dept., Peru

Video on Instagram

This is a completely unique specimen which I bought around 2001-2002 from an emailed photo by a supplier (and sold, and recently re-acquired). I have never seen another like it, since. The colors are fantastic! In person, they shimmer and change in lighting, and show multiple hues of rainbow iridescence. Joe Budd photos.