Mineral description : Gummite

Gummite as yellow oxidation products around uraninite. From Varuträsk.

Mineral class	Oxides : Uraninite - Ianthinite group.
Chemical formula	Hydrated uranium oxide
Crystal system
Habitus	As rubber like masses.
Cleavage
Hardness	2.5
Density
Color	Yellow to yellowish red.
Streak
Luster
Description
Occurance	As a secondary mineral associated to uranium ores.
Associates	Uraninite
Notes
Locations	Varuträsk pegmatite, Västerbotten. As yellow oxidation products on and around uraninite.

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