quartz
From Middle High German quarz (14th c., Bohemia), probably with the Central German development tw- → qu- (as in quer etc.) from a West Slavic language (compare Czech tvrdý, Polish twardy), from Proto-Slavic *tvьrdъ (“hard”).
Millora la teva pronunciació
Practica parlar i memoritzar " Quarz " i moltes altres paraules i frases a alemany .