Kasolite is an uncommon lead uranyl silicate monohydrate mineral named for the type locality at Shinkolobwe near Kasolo Hill in the Democratic Republic of the Congo

Kasolite mainly consists of uranium (40.53%), lead (35.28%) and oxygen (19.07%), but otherwise contains silicon (4.78%) and a small amount of hydrogen (0.34%). It has very strong radioactivity caused by its uranium concentration.

Kasolite is an oxidation product of uraninite.[4] This is the reason why it can usually be found in oxidized uranium deposits. In Kasolo, Congo, the mineral occurs in association with torbernite, curite, dewindtite and uraninite, and in Nabarlek, Australia, it can be found in association with rutherfordine, sklodowskite and curite as well.