e/All that glitters is not gold

Information
has gloss	eng: All that glitters is not gold is a well-known saying, meaning that not everything that looks precious is precious. The expression, in various forms, dates from at least as far as the 12th century. . It might even go back as far as Aesop.
lexicalization	eng: All that glitters is not gold
instance of	(noun) a difficult problem brain-teaser, riddle, conundrum, enigma