Mixing Gold Alloys: Compatibility & Casting Considerations

Question
I have a little gold deferent grades can you mix these also some white some yellow gold just want to pour into a simple shape for a watch fob. am i able to mix all together

                                           Thanks  Len

Answer
Dear Len
Yes you can, I would not do it if it was a custom job but, if you just want to mix it and use it like a nugget or one solid piece is ok.
You will not be able to roll it because the different alloys that are used to make white and yellow gold will make the metal real brittle.