I found these chunks of Chalcopyrite in a store in Highland Park a little while back and couldn’t not pick them up.

Chalcopyrite is a copper iron sulfide mineral that—when exposed to air—oxidizes in a wide range of blues, purples, golds, and pinks that make it look like the Ziggy Stardust of minerals. Some claim they can relieve joint pains if held over an afflicted area for a time…but I just love the way they look.

Go, nature.