Using conventional gemological methods, SEM, FTIR spectrum, Raman spectrum and UV-VIS spectrum analysis, combined with the processes of treatment and the mixture of glue, the authors found out the best way to distinguish the dipped turquoise, injected turquoise and the natural ones. The color of injected turquoise is stiff, while the color of dipped turquoise and injected turquoise under the long-wave UV fluorescent lamp is pale to strong blue. The authors found glue in dipped turquoise and injected turquoise under SEM, which could help differentiate three kinds of turquoise; however, this method is ruinous. The result shows that FTIR spectrum can differentiate Hubei turquoise from dipped turquoise and pigmented turquoise with 2 930, 2 860, 1 730, 1 460 cm^-1 absorption bands caused by the vibration of organic groups; this is the fastest, accurate and non-destructive testing method; meanwhile, 2 942, 2 873, 1 452, 1 620, 830 cm^-1 absorption peaks in Raman spectra are beneficial to distinguish the dipped turquoise and pigmented turquoise with the natural ones; UV-VIS spectra of the weaker 429 nm absorp-tion peak and the 677 nm absorption band can be used as the identification basis to distinguish the natural turquoise and pigmented turquoise, but they are unable to distinguish between natural turquoise and dipped turquoise.