Holden, Martin.
The encyclopedia of gems and minerals / Martin Holden ; consulting editor, E.A. Mathez. - New York : Facts on File, 1991. - 303 p. : col. ill.
0816021775
92065038
Gems--Encyclopedias.
Mineralogy--Encyclopedias.
The encyclopedia of gems and minerals / Martin Holden ; consulting editor, E.A. Mathez. - New York : Facts on File, 1991. - 303 p. : col. ill.
0816021775
92065038
Gems--Encyclopedias.
Mineralogy--Encyclopedias.