TY  - BOOK
AU  - Verena Pagel
TI  - Diamond grading ABC: handbook for diamond grading
SN  - 3-9800434-0-1
U1  - 553.82 Pag 
PY  - 1993///
CY  - Rubin & Son bvba, Antwerpen
KW  - Polytechnic - Jewellery
ER  -