What can I say about this piece? It is amazing. I believe English 9ct gold (can't find a mark) and as a guess, the stone is a spinel. Found in Scotland. The animal appears to be a mountain cat? It's hard to part with something like this; I do love the unusual . I doubt I will ever find another similar. Possibly Georgian but at least from mid 1800s. The key measures 2 inches, the chain with dogclip 1 1/2 inches. The stone is 1/4 inch wide - ruby color.