Mid 19th century; earliest use found in Henry Watts (1815–1884), chemist. From German Margarodit from Byzantine Greek μαργαρώδης pearl-like + German -it.
Definition of margarodite in US English:
margarodite
nounˈmɑːɡərədʌɪt
Mineralogy rare
A variety of muscovite having a pearly lustre.
Origin
Mid 19th century; earliest use found in Henry Watts (1815–1884), chemist. From German Margarodit from Byzantine Greek μαργαρώδης pearl-like + German -it.