Selling
      items used by women for adornment
Question

                What is the ruling on dealing
      in items used by women for adornment and selling them to women whom the
      vendor knows will wear them in order to flaunt themselves before
      non-mahram men in the streets, as he can see from the way she looks in
      front of him, and as is unfortunately widespread in some places?
Praise be to Allah.It
      is not permissible to sell them if the businessman knows that the person
      who buys them is going to use them for things that Allaah has forbidden,
      because this means that he is cooperating in sin and transgression. But if
      he knows that the purchaser is only going to wear them for her husband or
      he does not know anything, then it is permissible for him to sell them.