  A model for Gamma ray bursts inner engine based on quark stars (speculated to
exist in nature) is presented. We describe how and why these objects might
constitute new candidates for GRB inner engines. At the heart of the model is
the onset of exotic phases of quark matter at the surface of such stars, in
particular the 2-flavor color superconductivity. A novel feature of such a
phase is the generation of particles which are unstable to photon decay
providing a natural mechanism for a fireball generation; an approach which is
fundamentally different from models where the fireball is generated during
collapse or conversion of neutron star to quark star processes. The model is
capable of reproducing crucial features of Gamma ray bursts, such as the
episodic activity of the engine (multiple and random shell emission) and the
two distinct categories of the bursts (two regimes are isolated in the model
with \sim 2 s and \sim 81 s burst total duration).
