I wanted to ask that is there any defined profit by Islam for example if a man buys a necklace for 1000 and sold it in 25000 so is this justifiable and has Islam given us any guidance in this regard?

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It is acceptable as long as you are not cheating the customer or ripping them off. Sometimes a seller rips off the customer because the customer isn’t familiar with prices—that’s haram. But if the seller is not ripping of the customer—he’s made it clear this is his price, then it’s ok.

Yes, in Islam it’s not recommended to make an unusually high profit. Islam wants us to be as fair as we can with others