553.8  / L585p <br/>
Lewis, David <br/>
       PRACTICAL GEM TESTING 
 / 
 .- London: N. A. G. Press,  1977 
 .- vii,149 . 
<br/><u>Subject Headings:</u> <br/>Gems -- Testing;
<br><U>Copy Details:</u><br> Acc. No.: <b>A70770</b>, Full Call No.: 553.8 L585p,   Item type:  Books , Location: COMPACT STORAGE (BASEMENT), <br><b>------------------------- --------------------- ------ --------- ------- ------- --------- -------- </b><br>