Research Article
Spectroscopic Analysis for Harnessing the Quality and Potential of Gemstones for Small and Medium-Sized Enterprises (SMEs)
Figure 6
Photoluminescence (PL) spectra of (a) pyrope-almandine garnet, (b) Quartz, (c) Black tourmaline, and (d) Amethyst.
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(b) |
(c) |
(d) |