Why not ask for comparison photos - Pearl Paradise has a great photo studio and can do stills and video.
(pearls absorb more than water. They soak up perfumes. We still remember with horror a necklace which came back for re-stringing and reeked of a particularly pungent scent)
Have a think about what your pearl priority is - size, metal of clasp, can you live with a few surface flaws? What about colour matching? And, of course, luster. Contact them with this info and I'm sure they will fine two or three alternatives for you to look at.
And can I suggest you do this after Christmas when we're a bit less hectic?