Is Cubic Zirconia fake or real?!?

The Cubic Zirconium is fake diamonds. They would not turn her neck green. However if the 'silver' is fake. (not sterling silver) I will turn her neck green. The stones are erelevant to what you are asking but if you go into the store and look on the take. if it's real silver the tag will say so, if you're not sure ask an employee. hope this helps :)