Hey guys maybe i am just not realising but how am i seeing people using 3x specific gem in this trinket? i can only ever see 2 on the ah and they are unique equipped.
You can have 2 cata haste + 1 pandaria haste, same with crit. Reason being there are 2 separate cata haste and crit gems (quick+precise for haste, rigid+smooth for crit). This doesn't seem possible for other secondary stats, as there's no doubling of gems for them. And yes, they are all unique equipped.
edit: the pandaria haste + crit gems also have 2 separate versions, but at least according to wowhead's scaling slider the cata ones give more stats so you should stick to 2x cata + 1x pandaria.