chalcolite

[kal-kuh-lahyt]

noun Mineralogy.

Origin of chalcolite

First recorded in 1795–1805; chalco- + -lite

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

The last compound has the same composition as chalcolite and is simply the artificially prepared mineral.
A Brief Account of Radio-activity
Francis Preston Venable