en ‧ crust ‧ ed /ɪnˈkrʌstəd, ɪnˈkrʌstɪd/ BrE AmE adjective
covered with a hard layer of something
encrusted with/in
a gold crown encrusted with diamonds
mud-encrusted/jewel-encrusted etc
—encrustation /ˌɪnkrʌˈsteɪʃ ə n/ noun [uncountable and countable]