Symbol for the quincunx, an astrological aspect ⚻ (U+26BB .mw-parser-output .smallcaps{font-variant:small-caps}quincunx). The symbol is half a sextile, so the 4 arms are at an angle of 60° to each other (the bottom of a hexagon). See http://std.dkuug.dk/jtc1/sc2/wg2/docs/n3110.pdf, esp. Figure 8.
Own work
Lucis