you dont use them until ur gear is maxed out and then u have the option to break the limit of the gear upgrade
Alex Feas Kades
May 10, 2016 at 8:12 pm
Every type of item gold/green/oramge like rare/epic/legemdary have upgrafe limits once u hit them its says maxlvl then u use stones 5 stones for 5 levels in the weapon armor or jwelery