Verb
separate one part from another, usually the good from the bad
Pu’u Mahana, a gem of a beach in Hawaii, has olive-green sand, due to the olivine crystals winnowed from the eroding headland by the action of the sea.
St. Barbara is patron saint of workers that use explosives. Her pagan father beheaded her for converting to Christianity, and God in his wrath caused him to explode.