Thank you for your comments!

Now, our elderly friend who invents these special anniversary gifts, does not google.  She has her own list of which anniversary is which and I know that she and google do not see eye to eye!  (She is in her eighties and I'm not sure she has even heard of google.)

We have just celebrated our 10th anniversary, which is designated tin apparently.  Copper on her list is for the ninth.  She tells me she has already begun work on next year's gift.  Shall I google it or not?  What are the chances the list I find will agree with hers??!