Idea of Add to Favorites Icon
There is a "plus" sign which is like a cross, but the sides are even, centered inside a five pointed star with all sides that are equal. Both are outlined in black. The star is "hollow" otherwise" in that there is empty space surrounding the icon. Everything is straight (there are no curved lines).
This is the Add to Favorites icon for Windows 10
. Here we go. Optimized for 32x32 px, these are the simplest icons in the line style. Downloadable formats are PNG and SVG, among others. Icons8 icon pack is unique in providing a huge number of icons designed by the same team of four designers who create the new icons every working day in the same style and with the same quality. Same cool as the Bat Face, huh.