I adore pearls and spent some time digging around with them in the past few years, and while they are lovely, I do not believe it would be worth your $100 to get them appraised. While beautiful, the ones you have are not exactly uncommon (in my searches anyway), unless they are saltwater or you know of some other unique characteristic they possess. Just my opinion though, and certainly not a professional one, but I do love me some pearls!

FH doesn't like them though, so I won't ever get any of those from him.