I find that the answer to this common problem is the pearl. Pearls have long been a symbol of class and beauty on women and they seem to never fail in this department. Regardless of what kind of personality type you're working with when it comes down to your closest lady friends, pearls are bound to make everyone smile.
In addition to that, pearls and/or pearl looks tend to be much easier to buy in bulk for matching bridesmaids than other types of classy jewelry.
Choose the pearl for your big day and you won't regret it. It's a sure way to make everyone happy and see to it that they all look flawless.