Hi group. I just bought this interesting necklace at goodwill because I simply liked it. After doing some research I think it is a blister pearl but need confirmation, so I am asking here. It is about 2" x 2" and has a curved shape. The back is marked 925 *66RN. I think it is beautifully made and find it fascinating the way the pearls have grown into it. I have seen some blister pearls going for quite a bit of money, but, I do not know what determines the value in these. Any comments would be welcomed. Thanks all.