JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.3.0/css/font-awesome.css">
<span class="fa-stack">
     <i class="fa fa-fw fa-lg fa-star-half fa-stack-1x"></i>
     <i class="fa fa-fw fa-lg fa-star fa-stack-1x"></i>
</span>

CSS

.fa-stack i.fa-star {
    color:transparent;
    -webkit-text-stroke-width: 1px;
    -webkit-text-stroke-color: orange;
}

.fa-stack i.fa-star-half {
    color:yellow;
    -webkit-text-stroke-width: 1px;
    -webkit-text-stroke-color: orange;
    margin-left: -5px;
}