made of sterner stuff

Adjective

 * 1)  strong and determined.
 * 2) * 1933,, Drury Lane's Last Case, March 1946 republication as by Ellery Queen, Little, Brown, page 45:
 * sign hung from the bronze knob, and it stated without equivocation that the Britannic Museum was "closed for repairs." But the Inspector was made of stern stuff. He closed his right hand and with the resulting fist pounded formidably on the bronze. out popped the gargoylish head of a bulb-nosed old man. "Hey!" snapped this apparition. "Can't you read English?" "One side, brother," said the Inspector cheerfully. "We're in a hurry." The doorman did not budge
 * sign hung from the bronze knob, and it stated without equivocation that the Britannic Museum was "closed for repairs." But the Inspector was made of stern stuff. He closed his right hand and with the resulting fist pounded formidably on the bronze. out popped the gargoylish head of a bulb-nosed old man. "Hey!" snapped this apparition. "Can't you read English?" "One side, brother," said the Inspector cheerfully. "We're in a hurry." The doorman did not budge

Translations

 * Spanish: hecho de otra pasta