Using any kind of utensils or articles including gold or silver for food is prohibited in Islam. Even if they are only plated with it or just contain a small part. All other precious materials are permissible.

Use of gold and silver articles in purification

All plates, utensils and articles are permissible to use for food, drink and other purposes, provided that they are not impure, including precious ones. The only exception is the use of gold and silver articles for food and drink. This particular use is forbidden,

 These statements of prohibition specifically mention eating and drinking, but do not refer to other uses, which indicates that these utensils may be used for other purposes. The prohibition is general; therefore, it applies to utensils made of pure gold or silver, or plated with them, or those that contain some gold or silver.[1]