tagilite

\\ˈtagəˌlīt, təˈgiˌl-\ noun (-s)

Etymology: German tagilith, from (Nizhni) Tagil, Sverdlovsk region, Union of Soviet Socialist Republics, its locality + German -lith -lite

: a mineral Cu₂(PO₄)(OH).H₂O consisting of a hydrous basic copper phosphate and occurring in bright green reniform masses (hardness 3-4, specific gravity 4.1)