Jackie Kennedy taught us that pearls go with anything, and today we still find this to be very true. I have even seen pearls styled with a button down shirt and a pair of jeans, so they have definitely made the journey from a dressy essential to a casual appropriate.
As my mother said, 'Why not? Think of all the money you have spent on that other crap that didn't work? Why waste your money, just buy something you know will work!"