From the 5 characters I am Running at the moment I have received a total of only 2 Boss Gems (one Level 7 and 1 Level 8), got 1 useless scroll fragment - need at least 25 to use maybe in a year one other character might get one). I got 99 Blue Medals once, of that only got 1 star on each of 2 different toons. But 95% of everything I got was Treasure chests. Have done the "ten" roll maybe 4 or 5 times and everytime I got 8-10 Treasure chests. Of the treasure chests I get almost always level 1 gemstones