TY  - BOOK
AU  - Polk, Patti.
TI  - Collecting rocks, gems and minerals : identification, values, lapidary uses 
SN  - 9781440204159 (pbk.)
U1  - 552 
PY  - 2010///
CY  - Iola, Wis.
PB  - Krause 
KW  - Rocks
ER  -