Figures of the Article

• Typical DiamondView^TM images of CVD lab-grown diamonds
• Global lab-grown diamond (LGD) production and consumption summarized by Bain & Co.
• Typical IR absorption spectra of type Ⅱ diamonds: a.Type Ⅱa diamond; b.Type Ⅱb diamond
• Typical IR absorption spectra of type Ⅰ diamonds: a.Type Ⅰ aA diamond; b.Type Ⅰ aB diamond; c.Type Ⅰ aAB diamond; d.Type Ⅰ b diamond
• Typical inclusions in HPHT lab-grown diamonds^[8]
• Typical inclusions in CVD lab-grown diamond
• Typical DiamondView^TM images of HPHT lab-grown diamonds
• Typical laser photoluminescence spectra of HPHT lab-grown diamond
• Typical laser photoluminescence spectra of CVD lab-grown diamonds
• Typical laser photoluminescence spectra of natural diamond
• Power distribution curve of shortwave ultraviolet (a) and longwave ultraviolet (b) of gemmological ultraviolet lamp
• Schematics of a fluorescence spectrometer
• Three-dimensional luminescence spectra of N3 and H3 defects in natural diamond (without PMT calibration)
• DiamondView^TM images of HPHT synthetic diamond, showing greenish blue phosphorescence (captured after closing light 0.5, 1, 2, 3 and 4 seconds)
• DiamondView^TM images of CVD synthetic diamond: a.Fluorescence mode with standard filter; b.Fluorescence mode with orange filter; c.Phosphorescence mode with standard filter
• The fluorescence and phosphorescence (100-millisecond-delayed) spectra of CVD synthetic diamond
• Fluorescence lifetime difference between CVD lab-grown diamonds and natural diamonds (The data to the right of the blue vertical line are from natural diamonds)
• NV⁰ defect (in CVD diamond) fluorescence lifetime regression (using a double exponential function)