Cool Sign! Took me a moment as I came here wondering how you would engrave serpentine and then realized you showed me a way. Was thinking of a friend that one could find their house by the sign that said “Danger! Water on road when raining”
Edit : For the non rockhounds, serpentine is also a soft stone used for sculpture and stoves as it is resistant to any effects from heating.
Great sign.
Some things stick with you for the rest of your life. Like this movie scene:
Serpentine Shel, serpentine! 
This group continues to amaze! My wife and I quote that line all the time and nobody gets the reference.
That sign! SERPENTINE!
There’s no reason to shoot at me! I’m a dentist!
That’s what I thought it was somehow about when I read the title 
“And our final cheeky question – where’s the product made?” I thought it was in the North Pole by elves (hence the delays that kept coming around the fall holidays…) 
Is it a big secret that it’s made in the USA?
Here I was thinking the quote from the movie Cars the whole time…lol