.icon {
display: inline-block;
width: 16.3px;
height: 13.45px;
overflow: hidden;
}
.icon > svg {
position: relative;
}
.darkStar > svg {
top: 0;
}
.lightStar > svg {
top: -13.45px;
}
<span class="icon lightStar">
<svg width="16.3px" height="26.9px">
<polygon points="8.1,0 10.3,4.3 15.2,5 11.7,8.3 12.5,13 8.1,10.8 3.8,13 4.6,8.3 1.1,5 6,4.3" />
<polygon points="8.1,13 10.3,17.3 15.2,18 11.7,21.3 12.5,26 8.1,23.8 3.8,26 4.6,21.3 1.1,18 6,17.3" fill="none" stroke="#000000" stroke-miterlimit="10" />
</svg>
</span>
<span class="icon darkStar">
<svg width="16.3px" height="26.9px">
<polygon points="8.1,0 10.3,4.3 15.2,5 11.7,8.3 12.5,13 8.1,10.8 3.8,13 4.6,8.3 1.1,5 6,4.3" />
<polygon points="8.1,13 10.3,17.3 15.2,18 11.7,21.3 12.5,26 8.1,23.8 3.8,26 4.6,21.3 1.1,18 6,17.3" fill="none" stroke="#000000" stroke-miterlimit="10" />
</svg>
</span>