FA Half Circle

by Andrey Izman

HTML

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/font-awesome/4.4.0/css/font-awesome.min.css">
<span class="fa-stack fa-lg">
    <i class="fa fa-adjust fa-stack-2x green"></i>
  <i class="fa fa-adjust fa-rotate-180 fa-stack-2x grey"></i>
</span>

CSS

.green {
    color:green;
}
.grey {
    color:grey;
}