Mastin, John,  1865- <br/><br/>
The Chemistry, Properties and Tests of Precious Stones  [electronic resource] / 
John Mastin 
 -  Project Gutenberg,  2007 
 - Project Gutenberg  23626 .
<br/><br/> Public domain in the USA. 
<br/><br/>Electronic text 
<br/><br/><label>Subjects--Index Terms: </label>Precious stones 
<br/><br/><label>LC Class. No.: </label>QE