Purity: Ruling on Utensils Made from Metal Mixed with Gold or Silver
Practical Laws of Islam as per the teachings of Ayatullah Sistani
Ruling 230
If metal is mixed with gold or silver and made into a utensil, in the event that the amount of metal is such that the utensil cannot be called a ‘gold utensil’ or a ‘silver utensil’, there is no problem in using it.
-Ayatullah Sistani, Practical Laws of Islam, Purification (Taharah)