TY  - BOOK
AU  -  Sinkankas, John.
TI  -  Gem cutting: a lapidary's manual 
SN  -  9781626540491
U1  -  736.2028  23
PY  - 1962///
CY  -  Church & Dunn
KW  -  Gem cutting
N1  -  Includes bibliographical references and index
ER  -