On my first character, I bought the Ecliptic Gem Item Pack three times, and the Dark Mystery Item Pack two times. I got 4 pink gems (one duplicate) and the epic weapon Nightshadow.

Now, I got my second character to 26, and bought the Dark Mystery Item Pack seven times. I got all green items and a pink Nightshadow.

I tried three more times and finally got a pink gem (Vigorous Beast Gem). This gem is about the same as the level 25 Haleness gem. I can either farm the Haleness or buy it in cs for 40K. It looks like the item pack gems are much more expensive than just buying gems in cs.

Beast Crystal of Haleness (lvl 25), 1 Attack, 9 Defense, 170 Health
Vigorous Beast Gem (lvl 26), 6 Attack, 7 Defense, 150 health

It seems like the pink drop rates in item packs are much less they used to be. Has anyone else observed this?