all that glisters is not gold

all that glisters is not gold

People or things that have an outward appeal are often not as beautiful or valuable as they seem. The phrase with this wording (as opposed to "all that glitters is not gold") originated in the Shakespeare play The Merchant of Venice. I don't know if that necklace from the flea market will have the resale value you're anticipating. All that glisters is not gold, you know. Lady Margaret, I know he's an appealing marriage candidate in terms of prestige, but have you ever noticed how harsh he is to his servants? Just know that all that glisters is not gold. I wouldn't be too jealous of the family that lives in that lavish estate on the hill—all that glisters is not gold, you know.
See also: all, glister, gold, not, that
Farlex Dictionary of Idioms. © 2022 Farlex, Inc, all rights reserved.

ˌall that ˌglitters/ˌglistens/ˌglisters is not ˈgold

(saying) not everything that seems good, attractive, etc. is actually good, etc: Don’t imagine that because they are rich, they are happy. All that glitters is not gold.
The verbs in this idiom all mean ‘shine brightly’.
Farlex Partner Idioms Dictionary © Farlex 2017
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References in periodicals archive ?
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12- All that glisters is not gold.' The Merchant of Venice
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