As a chemist, this is the most pure specimen of gold I have even set my eyes on. I spent a year measuring the purity of gold for the treasury, and I must say that I have never seen a specimen of such beauty and purity.
aluminium phopshate wavellite. It was discovered there by John Hill in the late eighteenth century and named for William Wavell a local physician and #mineral collector. (photo by Crazy Dave Green on Flickr)