We provide a systematic way of calculating the quiver region associated with a given exceptional collection. As an application, we prove that \(\mu \) -stable sheaves, obtained as the cokernel of morphisms of exceptional \(\mu \) -stable bundles, are Bridgeland stable, using the determinant. In the subsequent sections, we focus on the case of even rank 2 instantons over \(\mathbb {P}^3\) and \(Q_3\) , where we prove that instanton sheaves, instanton bundles and perverse instantons are Bridgeland stable and offer a description of the moduli space near its only actual wall.
