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Standard catalog of gem values
Anna M. Miller, John Sinkankas
Bok Engelsk 1994
Gemstone & mineral data book : a compilation of data, recipes, formulas, and instructions for the mineralogist, gemologist, lapidary, jeweler, craftsman, and collector
by John Sinkankas
Bok Engelsk 1972
Prospecting for gemstones and minerals
John Sinkankas
Bok Engelsk 1970
Van Nostrand's standard catalog of gems
Sinkankas, John
Bok Engelsk 1968
Mineralogy : a first course : line drawings and diagrams by the author
John Sinkankas
Bok Engelsk 1966
Gem cutting : A lapidary's manual
Sinkankas, John
Bok Språk ikke angitt 1962