Conchiglia Spiny Purple Necklace

The Cheese is composed by mineral substances such as'aragonite and the calcium phosphate; and by organic substances such as conchiolin which is a protein. The mineral substances, united by the conchioline, are placed in layers that take the name of periòstraco, mesòstraco and endostraco.

Since ancient times it is one of the materials used by man as ornament and jewel, often engraved with various shapes and designs that highlight the nuances and colors, which can vary from white, pink, orange, yellow to blue, black, green, etc.