Is discoloration normal for gold crows and what would cause them to change colors?

Without a photograph it is difficult to give you an exact answer. Did you have root canals done on the teeth when the crowns were done? It's possible that you are seeing the root through the gum tissue. Many times when a tooth has a root canal it becomes dark. In the front of the mouth the bone...

This color is due to the light going into the tooth with very little reflection.  It is possible to ues an opaque white filling but it is very rarely a cosmetic problem.mmA new crown can be done in the future but is rarely worth the expense.

Without a picture it is difficult to determine the answer to your question without a picture. It is very possible to mask out the qrey caused by having a root canal. Also, a good dentist and lab should be able to accomplish this with only working on one tooth. The thing to know is that the tooth...

It would be acceptable to place a new temporary on the tooth at this point.  However, the final restoration, as you have been told, would need to wait until all healing has occurred, to make sure that the gum tissue does not change. 

I am sure that your dentist will make your permanent crown fit you teeth properly without a gap.  Let them know of your concern and they will take good care of you and give you a nice result.  Good luck!

Your best bet is to Redo the Dental crown and use a dental laboratory that does custom work.However, If for some unknown reason, you must keep the crown and do not want to remove it,You can also prepare the crown, as a veneer preparation, at this time, take an impression and order a customized...