Vulcan/packages/telescope-theme-base/lib/client/scss/global/_icons.scss

.icon-circle{
  border-radius: 100%;
  border: 1px solid currentColor;
  padding: 6px;
  line-height: 0;
  &:before{
    height: 12px;
    width: 12px;
    text-align: center;
    line-height: 12px;
    font-size: 10px;
    display: inline-block;
  }
}

.fa-fw{
  width: 1.5em;
}