In the case you don't notice yet, those new gems are from +12 to +20. You will need to be lucky 8 times with no drop to get item to +20.
So you will have to be lucky 8 times with not a single drop to plus your item. And we all know the chances

. I know ppl who already spent 25-30 jewels just to get item from +12 to +16.
First of all they raised the prices of plussing stones by a lot. Now they introduced the +20.... I can't really see how this can result in more happy players
SaitoHajime: the chance is really slim? Half of my guild already got those jewels. I would love to have so slim chances with gashas. Or you ment that the success rate of those jewels is really slim? Cos that I would believe....