This is a 16 inch Real Shell Necklace that was my late Great Auntie's,she travelled around the world as a child nurse for the rich when she was young in the 1950-70s so it could have come from anywhere in the world.
There is 7 x Mother of Pearl shells stringed together by a double string and 8 x wooden beads in between made in to a 16" long Necklace finished of with a Gold Metal Clasp and a chain and a Mother of Pearl Bead on the end, it is complete and in a good condition for its age.
Nacre is the same substance that is deposited around an object that becomes lodged in the mollusk--either naturally or inserted by humans--to become a pearl.
Although pearls are popular today, some past cultures regarded colorful mother of pearl as a more desirable component for jewelry and other objects.
Jewelry made from mother of pearl falls in the group referred to as organic jewelry -- jewelry that originates from a living creature, plant or organism
I have taken the best photos of it as I can so you can see it well,you are more than welcome to come and see it at my home in Bexhill-on-sea East Sussex.
Thank you for looking.