[PC] Butterfly Case Hardened ST [MW] Blue gem?

Hey. Pretty new to Case Hardened and really need someone to help me with this. My friend called it a "blue gem" and I had to check with you guys. Im not really in to Butterfly knifes and was thinking about trading it for something else, but dont know how much it is worth?

Tradelink: https://steamcommunity.com/tradeoffer/new/?partner=130350182&token=BUOscs2D

Pictures of it: http://imgur.com/a/Jvjup

Thanks guys.