A unique combination of Zinc and Copper put together using a centuries old craft gives it this very classy black colour. And added to this is very fine embellishment in pure silver which is inlaid into the metal and what you get is a very precious piece of art work that takes days to make a single piece. Worth the effort when you place it in your home and get compliments for it too! It makes for a great gift as well. The shell swings open. So use it to gift a piece of jewellery or use it to keep your precious jewellery too! Care - Wipe with a soft cloth. Do not wash it.