Matthew, Grace. <br/><br/>
True bolivianite. The story of ametrine.   

 - La Paz-BO   Grupo Express Press  2011 
 - p. 6-7 :   il.   
 - Irregular 
 - No. 11(Aug 2011) 
 - Bolivan Express. Made in ;   no. 11 .
 -   Grupo Espress Press.   .