What has the author John Sinkankas written?

Answer 1

John Sinkankas has written:

'Gem Cutting a Lapidarys Manual Edition'

'Gemstone & mineral data book' -- subject(s): Gem cutting, Handbooks, manuals, Mineralogy

'Prospecting for gemstones and minerals' -- subject(s): Mineralogy, Precious stones

'Emerald and other beryls' -- subject(s): Beryl, Emeralds

'Beryl' -- subject(s): Beryl

'Gemstones of North America (v. 2: Gemstones of the world series)'

'Van Nostrand's standard catalog of gems' -- subject(s): Catalogs, Collection and preservation, Gems, Precious stones

'Mineralogy for amateurs' -- subject(s): Mineralogy

'Field Collecting Gemstones and Minerals' -- subject(s): Collection and preservation, Minerals, Precious stones