Standard gemological properties for each of the specimens in Table 1 were determined to be normal for natural spinel. The isotropic refractive indices for the group ranged from 1.715 to 1.719. Most of samples had no fluorescence reaction during exposure to long-wave or short-wave UV light. However, three samples exhibited medium strength red fluorescence under long-wave. All samples had a strong red reaction when viewed through the Chelsea Color Filter in common with most Co colored blue stones. When examined with a handheld