Button: a small knob secured to an article (as of clothing) and used as a fastener by passing it through a buttonhole or loop.
I love vintage buttons for embellishing my crochet pieces. I keep them in old vintage jars. I also love ceramic buttons for some of my projects. If you are interested in purchasing some fabulous, handmade, ceramic buttons go to http://www.potteryhead.etsy.com/. She made the beautiful ceramic buttons that you see here.