Gummite
Gummite is a yellow amorphous mixture of uranium minerals, oxides, silicates, and hydrates of uranium, derived from the alteration of uraninite. It is named for its luster.
The material was also known under various names, mostly because of different origins of the samples, including: eliasite from Elias – the name of a mine at Jáchymov, coracite – a variety from Lake Superior, pittinite, pechuran, urangummit, and uranogummite.
