Does one tip at a piercing place?

Why not ask your older daughter.

From a couple of knowledgeable sources, (1 piercer, 1 multi-layered and multi-tattooed), for standard work between 15 and 20%. A little more if they are extra nice (understanding pain levels and talking you through it).

thanks -- would you know if this include the price of the jewelry or just the cost of the piercing itself?

It's for the piercing only. An additional gratuity is given when a special item is created or if the piercing palace has to go to extra lengths to get an item. For example, if your daughter specifically asks for a gem of any other item not in stock.

Thanks - I am ill informed when it comes to piercings and tattoos

Me too, for several reasons. I tip my waitress and barber. Percentage wise, I'm a very big tipper, though it doesn't come to a lot of money as I eat kind of cheap.

Thanks - the piercing went well - and I tipped him very well (greater than 20%). They didn't have a breakdown for the piercing vs jewelry so I just tipped off the whole thing. He gave us a free "gem" upgrade as they forgot to tell me I also needed to bring her birth certificate in addition to the passport to prove I was her parent. I had to run back home and get it.

I figured with all the piercings he had -- he had to be good at it.

Was very thorough and concerned about proper care and cleanliness. Warned about not going to places that use a "gun". He said they do not sterilize guns; that they simply tend to wipe it off with alcohol.

And there are some strange areas you can get pierced (interesting pictures to say the least).