Table 2. Elemental composition of pendants.

Element	Samples (% Concentration)
	CP6	CP8	GP11	MP15
Na	1.95 ± 0.2	ND*	6.10 ± 0.01	ND
Al	13.9 ± 0.02	76.5 ± 0.07	5.95 ± 0.02	8.15 ± 0.01
Si	63.0 ± 0.06	7.78 ± 0.01	62.3 ± 0.07	9.99 ± 0.01
K	0.75 ± 0.02	1.10 ± 0.03	2.30 ± 0.02	2.10 ± 0.02
Ti	0.36 ± 0.01	3.20 ± 0.01	0.70 ± 0.001	0.90 ± 0.01
Cr	0.55 ± 0.003	0.82 ± 0.03	0.30 ± 0.002	0.20 ± 0.02
Fe	8.32 ± 0.003	2.90 ± 0.03	1.20 ± 0.003	2.49 ± 0.03
Co	0.03 ± 0.002	0.03 ± 0.001	0.02 ± 0.001	ND
Sr	0.04 ± 0.001	0.03 ± 0.001	0.02 ± 0.001	ND
Zr	0.60 ± 0.003	0.56 ± 0.003	1.80 ± 0.06	28.5 ± 0.08
U	0.05 ± 0.001	0.05 ± 0.001	0.45 ± 0.001	1.03 ± 0.04
Ra	0.02 ± 0.001	0.02 ± 0.001	0.01 ± 0.001	0.04 ± 0.001
Pb	0.03 ± 0.001	0.02 ± 0.001	0.10 ± 0.001	0.03 ± 0.001
La	0.06 ± 0.001	0.03 ± 0.001	0.10 ± 0.001	2.53 ± 0.003
Ce	0.12 ± 0.006	0.13 ± 0.01	0.70 ± 0.009	5.60 ± 0.005
Th	0.89 ± 0.002	1.10 ± 0.06	12.6 ± 0.005	25.6 ± 0.06
Eu	0.24 ± 0.005	ND	ND	1.0 ± 0.005
Ba	0.02 ± 0.001	0.03 ± 0.001	0.10 ± 0.01	0.20 ± 0.001
Gd	0.07 ± 0.003	0.07 ± 0.001	0.70 ± 0.01	0.40 ± 0.002

ND*: Not Detected