12mm Soft Grey Shell Pearl Necklace, Knotted with Bolt Ring Clasp.  The length of this necklace    is 46cm (18").  I have photo'd this necklace next to the Light Silver Grey Shell Pearl Necklace so     that you can see the difference in colour.  If you want to make a long necklace from the Shell        Pearls the two different colours would go well. These beautiful Shell Pearls were an industry that developed as a result of the fishing industry in Asia but are now endangered due to the seas        warming.  These Shell Pearls are a by-product of the fishing industry and are made from the             discarded shells. It is considered a highly skilled industry.  If you decide to buy a couple there will be a 10% discount on each necklace.