مسائل المنتخبه (Articles Of Islamic Acts) - الخوئي، السيد أبوالقاسم - الصفحة ٤٨ - Household Utensils

metal mixed with gold and silver and the proportion of that metal is such that the utensil cannot be saidto be made of gold or Silver.
٢٣٨. If there is food in a gold or silver container and, in view of the fact that eating and drinking in utensils made of gold or silver is unlawful, a persontransfers that food to another utensil, there is no harm in eating or drinking in that utensil, provided that the people do not say that food is being eaten from gold orsilver utensils.
٢٣٩. There is no harm if the cover of the smoking-pipe which contains tobacco and fire, or the scabbard of a sword or knife or the receptacle of the holy Quran ismade of gold or silver. However, the recommended precaution is that the receptacles of scent, or antimony or opium which are made of gold or silver should not be used.
٢٤٠. If it cannot be helped there is no harm in eating or drinking from gold and silver utensils to the extent necessary but eating or drinking from them more thanthis is not permissible.
٢٤١. There is no harm in using a utensil about which it is not known whether it is made of gold or silver or something else.