.C{
position:relative;
left:10px;
top:12.5px;
width:84px;
height:95px;
border-width:15px12px15px16px;
border-color:#000000;
border-style:solid;
border-radius:50%}

.C::before{
position:absolute;
background-color:#ffffff;
content:'';
left:49px;
top:2px;
width:90px;
height:90px;
-webkit-transform:rotate(45deg);
-moz-transform:rotate(45deg);
-ms-transform:rotate(45deg);
-o-transform:rotate(45deg);
transform:rotate(45deg)}