This is Swarovski article #4627 the Rectangle Fancy Stone in the Vitrail Medium, a vibrant mix of green, fuchsia,yellows and blue.
It is foil backed as shown in the third photo. It measures 27mmx18mm and it does not have a hole! The back is faceted and cushion cut.
This is a Swarovski Advanced Stone and is lead-free.
You will receive one stone.