Where is the Best Place to Get A Valuation?

by karyn alaord
(leicester England)

I have a cultured pearl necklace with a total of sixty seven pearls, which are threaded plain. All pearls are uniform in size. The pearl necklace has a gold clasp with a single pearl mounted in the centre. Length 17 inches.
It is in a tortoise shell box. Writen inside the box, "Art Mallorqui Galerias sol Arenal".

Thank you

Karyn