What is this armour/outfit called ? Thanks                                                                                                                                                                          

 

 

 

That's the Golem armour that was available from Treasure Hunter a little bit ago:

 

"Equipping all pieces of the outfit increase the chance of mining ore and rocks by 7%, and removes aggression from living rock creatures. This chance increases when used in conjunction with quarrymaster auras."

 

Also don't think you can get it anymore? :(

To be more precise that is the magical golem outfit that was made by combined the sapphire, emerald and ruby variants.

 

Also it is unobtainable now, unless Jamflex sees fit to redo the promo or add it to the killing outfits that linger in the rare slots.