Limonite / Goethite : Nandan Co. Hechi Pref.

Nandan County, Hechi Prefecture,
Guangxi Zhuang Autonomous Region, China
 
61 x 46 x 35 mm          small cab.
 
I was really attracted to these eye catching Limonite / Goethite (not analysed but I suspect the latter) specimens when I first saw them come out of China in 2020. 
The rainbow irridescence of the mammilated habit of the piece is  just wonderful and so colourful. 
This seems to have been a short run of this unusual material as I've not seen any more.