Ziff
Encyclopedia
Ziff is an unknown metal
Metal
A metal , is an element, compound, or alloy that is a good conductor of both electricity and heat. Metals are usually malleable and shiny, that is they reflect most of incident light...

 mentioned in the Book of Mormon
Book of Mormon
The Book of Mormon is a sacred text of the Latter Day Saint movement that adherents believe contains writings of ancient prophets who lived on the American continent from approximately 2600 BC to AD 421. It was first published in March 1830 by Joseph Smith, Jr...

 (Mosiah
Book of Mosiah
The Book of Mosiah is one of the books which make up the Book of Mormon. The title refers to Mosiah II, a king of the Nephites at Zarahemla. The book covers the time period between ca 130 BC and 91 BC, except for when the book has a flashback into the Record of Zeniff, which starts at ca 200 BC,...

 11:3,8).

In Hebrew
Hebrew language
Hebrew is a Semitic language of the Afroasiatic language family. Culturally, is it considered by Jews and other religious groups as the language of the Jewish people, though other Jewish languages had originated among diaspora Jews, and the Hebrew language is also used by non-Jewish groups, such...

, this term means brightness, i.e. metallic brightness.
Near the end of the article at this link http://maxwellinstitute.byu.edu/publications/review/?vol=8&num=2&id=222 a Hebrew term thought to relate to ziff is mentioned.
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