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["DIAMOND IMITATIONS"]
["MATERIAL","COMPOSITION","REF.INDEX","DISPERSION","HARDNESS","SPEC.GRAV.","COMMENTS"]
["DIAMOND","C","2,42","0,044",10,"3,52"]
["SPINEL","Mg Al2 04","1,73","0,02",8,"3,64","look as glass"]
["SAPPHIRE","Al2 03","1,77","0,018",9,4,"look as glass"]
["RUTILE","Ti O2","2,8","0,33",6,"4,26","yellowish"]
["STRONTIUM","Sr Ti O3","2,41","0,19","5,5","5,13","excessive fire"]
["TTITANE",{"$nulls":5},"milky"]
["YAG","Y3 Al5 O12","1,83","0,028","8,2","4,55","less brillant"]
["GGG","Gd3 Ga5 O12","1,97","0,045",7,"7,02","heavy"]
["CUBIC","Zr O2","2,16","0,06","8,2",6]
["ZIRCONIA"]
["MOISSANITE","Si C","2,65-2,70",null,9,"3,2","double refrac."]

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