Added a 3D image

- Coal brikett 3D added

pages/Coal.html

@@ -27,7 +27,13 @@ body,h1,h2,h3,h4,h5,h6 {font-family: "Raleway", sans-serif}
 
   <!-- Images -->
   <div class="w3-row-padding w3-padding-16">
+    <!-- <div class="w3-half w3-container w3-margin-bottom">
+    </div> -->
     <div class="w3-half w3-container w3-margin-bottom">
+      <img src="../examples/Coal/coal_brikett_3D.png" style="width:100%">
+      <div class="w3-container w3-white">
+        <p>3D visualization of Coal Brikett</p>
+      </div>
     </div>
     <div class="w3-half w3-container w3-margin-bottom">
       <img src="../examples/Coal/orthogonal_slices.png" style="width:100%">