The Na-23 and Al-27 satellite transition spectroscopy NMR MAS spectra of polycrystalline of natural blue sodalite (Na8Cl2(AlSiO4)(6)) yielded the electric field gradient and chemical shift tensors at both the Na-23 and Al-27 lattice sites. The electric field gradients are smaller than those of previously studied similar systems. The principal values of the electric field gradient and chemical shift tensors and the relative orientations of their principal axes were obtained by computer simulating the spectra at two different applied magnetic fields. The relatively large chemical shifts for both the Na-23 and Al-27 nuclei can be attributed to the presence of Cl-35,37(-) anions, and the absence of water molecules, in the lattice unit cell.