There is a jewelry store for people who don't want to venture above 14th street but want to make a statement with their gift. Of course you can buy something for yourself too or travel to NOLITA from out of the area and you won't really need your passport.
Push has continued to grow in their designs and the materials they use, so if platinum and diamonds are what you are looking for than this is the place. The owner, designer is in residence to work with customers as well as a very friendly and staff. Magazines and celebrities discovered this goldmine, no pun intended, years ago and now it's your turn.