This is a lumpy coiled pot. It was fired in the simplest possible way. A bonfire was built around it and it was left in the fire.
The colorations are a side-effect of this process and were not painted or modified in any way.
If you want to use a picture in a blog or forum post, feel free to hotlink to the image on my site. If your site lets you post HTML:
<a href="http://www.wireheadarts.com/sculpt/pitfire/"><img src="http://www.wireheadarts.com/sculpt/pitfire/view.jpg"></a>
If your site uses "Forumcode" or "BBCode" this may work instead: