Is jewelry necessary for party?

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I always wear jewelry when attending the party,I think a party means gown or night dress,shining jewerly,handsome gentleman and lady,good wine and music...but my friend doesn't think so.She insist that it is not necessary to wear jewelry on party.Yesterday we attended a party ,I worn my new jewelry which is bought from website shop called aokeshen,while she worn in jeans and sneakers attending the party.We argued a lot.I think she is crazy!Yes,party is a serious occasion .Do you think it is necessary to wear jewelry on party?