Петр

div:before{
 content: ' ';
 position: absolute;
 display: block;
 width: 50%;
 height: 100%;
 border-left: ...;
 border-top: ...;
 border-botom: ...
}

<?xml version="1.0" encoding="UTF-8" standalone="no"?>

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<svg version="1.0" xmlns:svg="http://www.w3.org/2000/svg"
   xmlns="http://www.w3.org/2000/svg" viewBox="0 0 120 120" x="0px" y="0px" width="120px" height="120px">
    <path d="M 110.6133 3.8057 L 85.3066 26.5962 L 72.3525 49.686 L 60 49.9863 L 47.6475 49.686 L 34.6929 26.5962 L 9.3877 3.8057 L 15.2617 35.5933 L 35.2964 58.5332 L 31.2295 74.5742 L 32.8843 94.2168 L 39.0615 100.3633 L 42.5259 108.7607 L 52.4678 115.959 L 59.9795 112.9668 L 57.7627 107.085 L 52.4678 101.0781 L 60 104.877 L 67.5313 101.0781 L 62.2383 107.085 L 60.0205 112.9668 L 67.5313 115.959 L 77.4727 108.7607 L 80.9365 100.3633 L 87.1143 94.2168 L 88.7705 74.5742 L 84.7031 58.5332 L 104.7383 35.5933 L 110.6133 3.8057 Z" fill="#cecece"></path>
</svg>