if the necklace was purchased from Guernsey pearl in the channel islands - i think they mainly use freshwater pearls. The price depends on the condition, the number of pearls and the size of the pearls. sounds like they have been well looked after. Price comparisons can be found here:
http://guernseypearl.com/online-shop/4588159444
this is the first question ever posted on guernsey pearls. they sound beautiful. were they a gift?
