I was served by someone wearing it when I was away with DH last week and quite liked the look of it, then saw it on someone on TV last night which made me remember I was going to google it. I have done to no avail so thought I'd ask on here.
It's silver and the pendant is a round silver disc with writing engraved on it and it has a horseshoe around the top of the disc which is 'upside down' - you know the way they say not to hang them in case all the good luck runs out? 
Thanks if anyone can help. Although browsing the Tiffany website I've found one I like more 
but hey, you can never have too many necklaces!!!