Wild Force shard

A name given to crystals that were embued with the power of the Force and, in turn, could enhance the Force powers of an individual. The crystal would resonate in the force itself and, as such, had not affinity with the Darkside or lightside of the Force but simply influenced the vicinity it was located in. It is for this reason that the Jedi Order never used such force crystals as they could easily amplify darkside or lightside powers; which could potentially turn a Jedi to the darkside.

Source

 * Living Force Campaign website