Natural gemstones
Contributors: Geological Survey (U.S.)
Publisher: U.S. Dept. of the Interior, U.S. Geological Survey
Published: 1992
Place of publication: [Reston, Va.?]
Language: eng
Number of pages: 16
Subjects: Precious stones -- United States.; Precious stones -- Collection and preservation -- United States.; Gems -- United States.
Notes: Shipping list no.: 92-0528-P

Includes bibliographical references (p. 13-14, 16)