Boltwoodite

Introduction: Boltwoodite is named after Bertram Borden Boltwood, an American radiochemist from Yale University. Superb crystals are mined in Namibia, easily recognised by its bright yellow crystals, needle-like and sprayed- in arrangement , similar to radiating balls. It occurs in uranium deposits and alaskite veins.

Distribution: Goanikontes in the Rössing Area produces magnificent examples of boltwoodite where it is mined specifically for mineral specimens. The criss-cross network of white alaskite dykes in the Khan River Gorge east of Swakopmund is an unusual example of rocks containing uranium minerals.

Composition: Silicate

Crystal system: Monoclinic

Lustre: Pearly to vitreous

Streak: Light yellow

Hardness: 3.5-4