JSP Gold Testing Stone， Genuine， Natural Obsidian<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Genuine and natural obsidian</li><li>Jet black， for the highest contrast</li><li>Smooth surface is the best way to test gold</li><li>convenient 5" x 2" surface size</li></ul></div><img src="http://ecx.images-amazon.com/images/I/31TLnki89kL.jpg" noproxy>