Boegel, Hellmuth.
The studio handbook of minerals : a guide to gem and mineral collecting / [by] Hellmuth Boegel. Rev. and edited by John Sinkankas. Illus. by Claus Caspari. [Translated by Eva Fejer and Patricia Walker]. - New York : StudioViking, 1972. - 304 p. : ill. - A studio book .
067068015X
74117068
Precious stones.
Minerals.
549
The studio handbook of minerals : a guide to gem and mineral collecting / [by] Hellmuth Boegel. Rev. and edited by John Sinkankas. Illus. by Claus Caspari. [Translated by Eva Fejer and Patricia Walker]. - New York : StudioViking, 1972. - 304 p. : ill. - A studio book .
067068015X
74117068
Precious stones.
Minerals.
549