glitter

All that glitters is not gold, and All that glistens is not gold.

Prov. Just because something looks attractive does not mean it is genuine or valuable. (Often said as a warning.) Hollywood may look like an exciting place to live, but I don't think you should move there. All that glitters is not gold. I know Susie is popular and pretty, but don't befooled by that. All that glitters is not gold.

See also: gold

glitter with something 

1. to sparkle with something. Her earrings glittered with many tiny diamonds. The tree glittered with tiny ice crystals.

2. [for eyes] to shine with a strong emotion. Her eyes glittered with anger. The eyes of the great beast glittered with ravenous hunger.

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All that glistens/glitters is not gold.  (British, American & Australian) also All that glisters is not gold. (British literary)

something that you say to warn someone that sometimes people or things that appear attractive have no real value This film has an all-star cast, but all that glisters is not gold. It fails because of its weak story.

See also: glisten, gold