Mineral description : Thucholite

Thucholite from Viitaniemi, Finland.

Mineral class	Organic
Chemical formula	A mixture of hydrocarbons, uraninite and sulphides.
Crystal system	amorph
Habitus	As small aggregates or as fillings in cracks.
Cleavage	None, brittle.
Hardness
Density
Color	Black
Streak	Gray to black.
Luster	Dull (In my Viitaniemi species)
Description	An asphalt like mineral, sometimes radioactive.
Occurance
Associates
Notes	Sometimes radioactive. Sometimes sorrounded by secondary uranium minerals, look for neon green spots in UV-light.
Locations	Boliden mine. Filling out cracks. Stripa iron mine, Västmanland. Filling out cracks. Viitaniemi pegmatite, Finland. As small black balls in cleavlandite.

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