Blue Emerald CZ⁠.  Here's something for the collector - this color was a 'mistake' by the factory and will not be made again⁠.  These cut SPARKLING gems with a high refractive index (RI) of 2.15 - 2.18.  

These are graded quality A-B, meaning that there are minor manufactural inclusions/veils to work around.  

75.43 grams / 377 carats / 30 x 29 x 27 mm