Show C EMS GEMS DYED WITH RADIUM artificial color can be given to precious stones by use of the costly metal with chloride aill an 3 bamide of 0 ra drum at a milligram or 6 00 a grain the use rise of oc radium to give gie artl arti ficiala color to precious stones has lit tie industrial promise to rite gie n more accurate idea ot of the los I 1 possible sible changes charig cs armbricht Arm brocht in london has been experimenting for miny many months and h his is produced some remarkable effects upon pon color about whito ca sapphires sapp hires pure oxide of aluminum were L re kept in contact radium two or 01 three weeks about 70 per cent turned yellow the shades ringing ranging from lemon to dark orange a te fe v apparently patently ly from another locality be came gren green pinkish or st color an ind d a i ern er few changed to rose color A light blue was vas imparted to two or three too light to give value a approaching pro aching that of the much prized deep blue sapphires sapp hires palo pale emeralds emerald were nere somewhat some somei whit Nhat darkened dirk ened by radium but were arc riot not gien the deep green of the ex 1 afie stones hron diamonds amonda dl NN ere bleicher blei ched almost noth nothing 1 ng being obtained like tile the beautiful b blue I 1 ue gem into which sir nm m crooks trans formed i a yellow diamond amethyst were ere altered by radium into or yellow quartz dirty appearing ip I 1 earls were cle cleaned arted to a clearer white but opals T v ere not amenable to treatment |