Office Fabric UI Icon for spfx Web Part not showing

Is there a limited set of Office Fabric UI icons available for use as a spfx web part icon? I'm building a spfx web part and I want to use one of the fabric icons, but only a handful seem to work and not the one I want. If I stick with "Page" or "Sunny" no problem. I'm trying to use "TabletMode" and it just doesn't display.