User blog comment:Lord Loss/Monster Hunter Theory... Blog/@comment-6050823-20130206223334/@comment-6050823-20130210151704

Well I just found something intresting about Pure Silver,has the highest thermal conductivitiy(Basically meaning it could collect heat easily) and the same goes for Gold.This could explain why the Gold Rathian and Silver Rathalos aren't really found in hotter enviroments like the Red/Green and Azure/Pink.Plus Silver and Gold are stable in pure air and water(Gold only with moisture but,possibly water).