Similar words
cristal
Worth distinguishing: quartz is a specific type of crystal; cristal is the general word.
Similar in other languages
Spanish
cuarzo
cuarzo is the Spanish word for the same thing — both mean "quartz."
French
quartz
quartz is the French word for the same thing — both mean "quartz."
Practice
1 What does quartzo mean?
quartz
2 Fill the gap: Um cristal de ___.
Full sentence: Um cristal de quartzo. (A quartz crystal.)
3 Which fingerprint chart matches quartzo?
quartzo: neutral register, common frequency, general domain, neutral connotation.