phacolite
/ˈfakəlʌɪt/(also phakolite)
noun
Mineralogy. A colourless variety of the mineral chabazite occurring in crystals of lenticular form.
Origin
Mid 19th century; earliest use found in Joseph Portlock (1794–1864), surveyor, army officer, and geologist. From phaco- + -lite, in sense 1 after German Phakolith.