Thanks. I forgot the Z10 had NFC. That's pretty cool.
This explains why it has what looks like an RFID chip as well- that must be the NFC antenna itself.
Here's a video on how to use the NFC (Near Field Communication)/ smart tag/ "tap-to-share" feature for any other NFC newbies: BlackBerry Z10 Support - How To Demo BlackBerry Z10 Smartphone Help 101