Hello Kitty is the one of Sanrio mascot. It's very popular in the world (Especially for the girl)
With the pink design and a lovely cat, It's makes everyone feel love when see it.
Hello Kitty also made in Jewelry too.
The girl who's lovely and cute (Kawaii in japan ^ ^) is match to this kind of jewelry.
If you want Hello Kitty and other Sanrion Mascot Jewelry, I suggest this website ...
http://shop.sanrio.com/Jewelry/Jewelry,default,sc.html
however, you can found Hello kitty jewelry on Amazon.com and Ebay too. (Easy to find out ... very popular)