
TY  - JOUR
A1  - Emerson, Don 
T1  - Opal: the queen of gems
JF  - Preview
JO  - Preview
Y1  - 2016
VL  - 2016
IS  - 185
SP  - 37
EP  - 45
KW  - 
UR  - https://doi.org/10.1071/PVV2016N185P37 
ER  -

