Convert ICON to SVG

Graphics icons can be actually created from both raster and vector sources, so it should be not hard to find a tool that can be used for this purpose. You can find many graphics editors or even dedicated icon making software that would be up for the task of recovery of vector graphics from icons, which is probably the case of icons that offer automatic resize function. If not, the only way to get SVG image out of raster source is to use tool that offers tracing function, i.e. allows of making vector graphics from bitmaps.