Hello,

Yes, you can but you will have to edit theme files for this. Go to file \includes\view\blog\loop-index.php and find these lines:

<div class="shares_container">
  <ul class="shares">                 
    <li class="facebook"><?php echo $facebook_shares; ?><i class="moon-facebook"></i></a></li>
    <li class="twitter"><?php echo $twitter_shares; ?><i class="moon-twitter"></i></a></li>
    <li class="google"><?php echo $google_plus_shares; ?><i class="moon-google"></i></a></li>
    <li class="tumblr"><?php echo $tumblr_shares; ?><i class="moon-tumblr"></i></a></li>    
</ul>
 <li class="shares"><a href="javascript:void(0)"><i class="steadysets-icon-share"></i></a></li>
</div>

Change the icon’s class to your wish. Save changes. We recommend to keep a copy of the edited file so you can replace the changes in case of future theme update. Or use a child theme to customize further theme style.

Best regards!