Hello amptpoket, and welcome to the Glass Message board.
We try to help each other identify glass by posting picture HERE so we can all see them and give you the most help possible.
It also means that the pictures are here for posterity so that if a similar question arises in the future, there is a reference to yours which may help someone else. It is by this means that we will be able to try to help you.
Your decanter sounds beautiful and we eagerly await pictures.... it may well be that one of our members may know exactly what it is and who made it.... we have many experts on the board and although they are often very busy, they do take the time to pop in and see what is new, so post your pictures and be a little patient until the right person comes along.