What does a diamond logo with the letters PG mean?

I recently found this 14k white gold bracelet, and on the inside of the clasp are the markings 14k (i know what that means) and also a symbol of what looks like a diamond and the letter P inside on the top and the letter G inside right below the P. What does this mean? Is it a company logo or a standard jewelry mark or what? Thank!|||Usually after the 14k it's gp and it means gold plated.|||Parental Guidance. It means you don't take a lot of risks and you are a goody two shoes.|||If the P and G are SEPERATE from the 14k stamp, then it's a jewlery manufacturer's hallmark- an identifying stamp. Sounds like a hallmark to me....