TY  - BOOK
AU  - Robert Webster
TI  - Practical gemmology : a study of the identification of gemstones,pearls,and ornamental minerals
SN  - 7198 0011 0
U1  - 736.2 Web 
PY  - 1976///
CY  - Colchester, NAG Press
KW  - Polytechnic - Jewellery
ER  -