Detailed mineralogical and gemological records were conducted on 340 unheated spinels from the Horana,Eheliyagoda,Ratnapura,and Okkampatiya mining areas in Sri Lanka.The color of Sri Lankan spinel varies greatly:in addition to the mainstream pink to purple pink,green and blue can also be seen.Compared with spinel from other regions such as Myanmar,Vietnam,and Tanzania,Sri Lanka's spinel has more abundant inclusions:several mining areas generally have in-clusions such as dolomite,apatite,zircon,and chondrodite.Minerals such as graphite and forsterite are also found in spinel produced in the Horana region;graphite and rutile have been found in spinel produced in the Okkamptiya region.Partially healed fissures are most common in spinel in the Okkampatiya mining area;Unlike Vietnamese spinel,dislocations and growth structures are almost absent in Sri Lankan spinel.The LA-ICP-MS analysis results showed that there were no significant differences among the mining areas.LA-ICP-MS analysis of 5 Sri Lankan cobalt blue spinels showed a variation of 11 to 120 ppm in this chromogenic element.The UV visible absorption spec-trum results show that Sri Lankan spinel has a combination spectra with variable ratios of the spec-tral components Cr3+,V3+ and Fe2+ from pink to red,orange,purple to purple,and blue-green.The results of infrared spectroscopy and laser Raman spectroscopy analysis showed that all samples showed no indications for heat treatment.