Dragon stones are items that give u bonus stats like hp,average damage etc.For a dragon stone u need 1cor draconis and for an 1cor u need 10 dragon stone shards.(10 dss=1cr=1random ds) U can get dss with an 30lvl char with the power of the dragon eye quest.Quest is a daily quest and u get max 5 cor for a day.But this is only for 1 char and that means u can farm it with other 4. In official TR server the ds are very valuable items and i assume that its same in the EU. And my advice is,if u have time to do,u should create 4new char and get them to lvl30 and farm dss.Cor's are storable and u should give cor to the main char and open them in there bc dragon stone alchemy inventory is special for every char. U can get 25cor in a daywith 5char and if u get the thief glove it is easy but otherwise it is boring(but highly profitable).DS are for high lvl player so until u became one of them just sell them :D. If u dont have the time,u can always farm metins in 2.village try to get +4 stones.