Wollaston, T. C. <br/><br/>
Opal :  the gem of the never never. 

 - London :  T.Murby,  1924. 
 - 164 p. :  il. ;  21 cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mineralogía<br/>Opalo
<br/><br/><label>Index Terms--Genre/Form: </label><br/>Libro
<br/><br/><label>Universal Decimal Class. No.: </label>549.514.53