Is a well known sayin' ! Meanin' that not everythin' that looks precious suitable or true turns out to be so! This can apply to persons, places or things that promise to be more than they really are. The expression in various forms, originated in or before. Unpure or fake gold which reflects substantially more light than authentic gold does !! Gold in it's raw form appears dull and does not glitter ! Nani anabisha kwamba si kila king'aacho ni dhahabu ?