Looking for the name of a purple muscle rub that my grandmother used to use...?

I used to get Charlie horses really bad as a kid, and my grandmother would always put some kind of purple muscle rub on my legs.  It was in a small, round jar (about 2 or 3 inches tall) with a white lid. I think the label was gold.

Does anyone have any idea what I'm talking about?   If so, do you know the name and if it's still around? 

P.S.  All of the grands have passed, so I can't ask any of them, and no one in my family can remember the name. (We always just called it "the purple stuff"!)