Hurlbut, Cornelius S. 1906-2005.
Gemology /
Cornelius S. Hurlbut, Jr., George S. Switzer.
- New York : Wiley, 1979.
- xii, 243 p., [12] leaves of plates : ill. ; 25 cm.
"A Wiley-Interscience publication."
Includes bibliographies and indexes.
0471081442
Precious stones.
QE392 / .H87
553.8 / H965