Miriam Haskell Necklaces that Belonged to My Husband's Aunt. Is there a market for the necklaces?

by Meg
(Chicago, Il)

So far we have identified 2 peices. One necklace is yellow with large beads that look crackled. The clasp is signed and has a flower decoration on it. The other is a milky blue pearl beads with crystal and small beads between each bead. This clasp is also marked and has flower on it.

Both pieces need to be cleaned.

My question is #1 how to clean them and #2 how much are they worth? is there a market?