TY  - GEN
AU  - Sofianides , Anna S.
AU  - Harlow , George E.
TI  - Gems and Crystals
SN  - 1855853914
U1  - 553.8 
PY  - 1990///
CY  - London
PB  - Parkgate Books
KW  - Geology
KW  - Gems
KW  - Crystals
KW  - Natural - Minerals
ER  -