That increases bonusies what dual gems (games what have 2 different gems combined) has, its extremly useful!Because I have maxed it, my dual gems has 60% more damage than normal!
yep its almost the best gem magic dual gems are better than the pure ones so its a good idea to maximize this one if i was to measure the gems magic that power up gems i would say that dual gem mastery is better than the pure one which is better than the prismatic one. my advise is to always combine gems to make them double color if you combine the dual color gem with a third color gem the combined gem will get less powerful just put you skills at dual gem mastery and forget about the pure and the prismatic .this will help you pass many stages .There are some hard ones however that you will have to use also the pure or only the pure gem mastery always if you have trouble at passing a lvl rearrange your skill points or try going back at a previous one to gain exta exp
