This translucent crystal is white in its purest form but usually has a bright yellow tint from minor impurities that becomes orange, then red with decreasing quality. Pulac forms when subspace radiation slowly alters the molecular matrix of certain other minerals, a process thought to take billions of years. It cannot be manufactured synthetically. Because its crystalline structure is tuned to subspace radiation pulac can be used to detect subspace currents, which is vital to identify safe jump destinations for displacement drives or to receive subspace communication. Pulac can even be used to tap into subspace as an energy source but this usually burns out the crystals after some time. When exposed to hard radiation (like from weapons fire) pulac tends to burn out in an explosive discharge.