Spectroscopic Analysis for Harnessing the Quality and Potential of Gemstones for Small and Medium-Sized Enterprises (SMEs)

Table 1

Concentration of impurities within the gemstones characterized in this study.

Gem stone		Au	Ca	Mg	Fe	Na	Al	Si	O
Pyrope-almandine garnet	wt.%	—	1.09	3.63	20.00	—	10.57	17.15	47.56
	A%	—	0.60	3.31	7.94	—	8.59	13.54	65.92
Quartz	wt.%	—	—	—	—	—	—	48.10	60.90
	A%	—	—	—	—	—	—	26.78	73.22
Black tourmaline	wt.%	—	—	1.49	8.98	0.98	19.24	18.88	50.44
	A%	—	—	1.27	3.35	0.89	14.84	14.00	65.65
Amethyst	wt.%	4.68	0.66	—	—	—	—	53.31	41.34
	A%	0.53	0.37	—	—	—	—	41.97	57.14

Note. Boron was not detected in Black tourmaline EDX spectra due to low X-rays energy.