Victorian Amethyst Cufflinks Marked H.A. & CO.

These are quite possibly the most ornate cufflinks I've ever seen! Beautiful amethyst that looks like each one was hand carved. Ornate gold and they are marked with what looks to me like H. A. & CO. I don't really collect cufflinks but I've recently come across a couple pairs from a recent lot I bought at an auction that I really like and just might start a collection of odd and ornate cufflinks!!