Figures of the Article

• Synthetic alexandrite samples by the HOC method: (a)led light source; (b) tungsten light source
• Synthetic alexandrite samples by the czochralski method (top) and natural alexandrite samples (bottom): (a) led light source; (b) tungsten light source
• Internal characteristics of synthetic alexandrite samples by the HOC method: (a-d)oriented elongated voids; (e-f)metal inclusions
• XRF test results of synthetic alexandrite samples by HOC method
• UV-Vis spectra of synthetic and natural alexandrite samples
• Fluorescence spectra of the HOC method synethetic alexandrite and natural alexandrite samples: (a), (d)sample H-2;(b), (e)sample H-3;(c), (f) sample N-2 (Fig.d, e, f are partial enlargements of a, b, c, respectively)
• The photoluminescence spectra of HOC method synthetic alexardrite and natural alexandrite samples
• Infrared transmission spectra of HOC method synthetic alexandrite and natural alexandrite samples