This is a beautiful formation of blue botryoidal plumbogummite. This specimen was collected from the Yangshuo Mine that's located in the Guangxi Zhuang Autonomous Region of China. One edge of this specimen has been cut flat so that it can stand on its own.
Plumbogummite is a rare lead phosphate mineral with the chemical formula PbAl3(PO4)2(OH)5•(H2O). It forms in oxidation zones of lead deposits and primarily forms as a botryoidal mass after other minerals. The "plumbo" portion of this mineral's name is derived from the latin word for lead, "plumbum". "Gummi" comes from the gum like appearance that the mineral often displays.