Gem stones
Subtitle: a chapter from Mineral facts and problems, 1985 edition
By: [by J.W. Pressler].
Contributors: United States. Bureau of Mines
Publisher: U.S. Dept. of the Interior, Bureau of Mines; For sale by the Supt. of Docs., U.S. G.P.O.
Published: 1985
Place of publication: [Washington, D.C.?]
Language: eng
Number of pages: 11
Subjects: Precious stones.; Mines and mineral resources -- United States.
Other titles: Mineral facts and problems.
Notes: Cover title.

At head of title: Bureau of Mines preprint from Bulletin 675.

Bibliography: p. 11.