9 Photos
Gummite
Species	Oxides & Hydroxides
Mohs Scale	2-5
Specific Gravity	3.9-6.4
Color	Orange, yellow, orange-red, red-brown, brown-black, black
Streak	Yellow, brownish, olive-green
Luster	Vitreous, Waxy, Greasy, Dull
Diaphaneity	Translucent
Cleavage	None Observed
Fracture	Irregular/Uneven, Conchoidal

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 gum-like consistence.

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.