Gold is precious whether you find it refined or unrefined. You may not always find refined gold but the good news is that there are refiners who can do the work. You should not be letting someone you cannot trust handle the process. You might be having a lot of names when it comes to gold refiners but you have to look beyond the obvious in knowing the best person to work with. Prior to paying for the services or agreeing to work with a particular person, you ought to make sure you have talked about time it will take to get the finished product. You should be expecting a time that is between days and weeks. With gold that has high purity level, you do not expect the work to take weeks. You do not expect high quality refining of a lot of product in a day which is why you should investigate the methods used a little further in such a case. The fee might be too high if you are not careful. Ask about every charge that goes into the bill before you agree to the process. Ensure you have a written price estimate before you bring your product to the professionals. Anyone who says there is a flat fee should not be easily trusted.
You should get an explanation on whether it is the material you take for refining that will be worked on and submitted back to you. Rarely will you get back exactly what you took to the refinery. The refiners will do a sampling of what you have submitted to them, assay determination and then settlement after which the unrefined gold will be combined with others and processed. Even so, these refiners will already have precise information on how much of pure gold you should be able to get after the refining process so that they can deliver that at the end of the day. There is no question of whether or not you will get a pure product but you should not expect it to be strictly from what you delivered.
Unrefined gold value varies from one batch to another. You need to ask about the analytical methods used in determining gold value by different refiners. Cupellation is the popular method in determining gold value all over the world. Gold is highly valuable which is why you need the assay determination to be done by more than one person just to be sure. No one should make you feel bad about that. Make sure you know how disputed assay results are settled before hiring.