Chalcopyrite with Siderite

Item Description

Sulfides are not terribly common from Brazil, let alone large Chalcopyrite twins. This is one of those rocks that simply looks better in person. It's oxidized, and would benefit from a bit of cleaning, but that doesn't take away from the fact that it's a large, sharp, very well-formed twinned crystal with very little damage all the way around. Minor tan compressed rhombs of Siderite make for a nice touch