“…Significant progress has been made by developing different materials of natural topaz [ [8] , [9] , [10] , [11] ], synthetic topaz [ [12] , [13] , [14] , [15] , [16] , [17] , [18] , [19] , [20] , [21] ], beach sand-Teflon composites [ 22 , 23 ], wollastonite-Teflon composites [ 24 ], citrine-Teflon [ 25 ], and natural topaz composites [ 1 , 7 , [26] , [27] , [28] ]. Recently, sintered synthetic topaz/corundum compounds – obtained by the hybrid-system chemical vapor deposition or HYSY-CVD route, developed at CINVESTAV-Saltillo [ [29] , [30] , [31] ]– with thermoluminescent behavior were reported [ 32 ].…”