A large plurality of French Moslems of North African origin are Berbers, i.e. of European rather than Arab type. A large proportion of the others fall well within the range of skin tones etc of "native" French people. Add to that the fact that, in places where some women of North African origin wear headscarves, there are also large numbers of non-headscarf wearing North African women.

So, indistinguishable from their classmates. Really.

_{It is rightly acknowledged that people of faith have no monopoly of virtue - Queen Elizabeth II}