This is a Sterling silver necklace with a silver hanger with Aqua Calcedone. The necklace has a so called Venetian link. This is the name for the square links in the necklace. The necklace has a thickness of 1,3 mm and a length of 45 cm. The size of the stone in the necklace is height 7mm and width 4 mm. The thickness is 5,5mm. The silver surround is 11mm x 8mm
 
The hanger can also be bought seperately for EUR 8,95 and the necklace for EUR 17,50.