Beside the Micro black holes, there is greater (1000 and more) chance to produce Strangelets.
None where found so far at the Relativistic Heavy Ion Collider (RHIC) but it is believed that the
higher energy of the lead-lead collisions of the Large Hadron Collider (LHC), compared to the RHIC,
will produce more strange quarks in the quark-gluon plasma (QGP).
Before i try to explain it with my poor english skill here a fast explanation from Wiki:
If the strange matter hypothesis is correct and a strangelet comes in contact with a lump of
ordinary matter such as Earth, it could convert the ordinary matter to strange matter.
This "ice-nine" disaster scenario is as follows: one strangelet hits a nucleus, catalyzing its
immediate conversion to strange matter. This liberates energy, producing a larger, more
stable strangelet, which in turn hits another nucleus, catalyzing its conversion to strange matter.
In the end, all the nuclei of all the atoms of Earth are converted, and Earth is reduced to a hot,
large lump of strange matter.good night from here