TY  - BOOK
AU  - Metz,Rudolf
TI  - Minerals and precious stones
SN  - 0-00212110-7
U1  - 553.3 
PY  - 1973///
CY  - London
PB  - Collins
KW  - Economic geology -
KW  - Economic geology - Gems -
N1  - Includes glossary,index of minerals,bibliography
ER  -