Stunning!  Beautiful!.......A piece of Italy.
Here we have a green, blue and gold Murano glass pendant on a black corded necklace.  This pendant is Murano glass.   The pendant measures about 2 inches long and just shy of 1/2  inches wide.  With the cord it measures 16 inches long and also contains a 2 inch extender chain to elongate the necklace if needed.  It is a beautiful necklace and would compliment your outfit nicely.