why glass ?.if she could excrete diamonds then she would start paying f whole nations debt . I think its initial stage thats why only glass .just wait and see ,once her glass making forehead gets matured she will start emitting daimonds .Hurraayyy Nepal will be rich . Glass is made of sand ( Silicon dioxide ) ,soda (sodium carbonate) and lime (calcium carbonate ). majority of components being carbon .Diamond is nothing but carbon ,its tightly packed atoms of carbon makes it the hardest substance known to human being .