The pearls:

,

, Green, Purple (if you see the last one - run into a fruit and while immortal go and take it

). Make everything on the level (except for falling big crystal) disappear and

appears on every available spot on the level. Each one give points depending on the pearil you got and gives +50k if you get them all.
If you get C-R-I-S-T-A-L in order you get 150 000 points which could be 2 lives if you get a life with those points.