Narwhal tusk

File:Narwhaltuskwp2.jpg

Narwhal tusk

Description

The long, straight, spiraled tusk of the narwhal, Monodon monoceros, that is native to the Arctic Ocean. The male narwhal has two teeth, one of which continually grows forward from the left side of its upper jaw. The second tooth forms a smaller tusk on the right side. The left tusk can grow up to 8 feet in length and is hollow for most of its length. The dentin is close-grain, white, and more brittle than elephant ivory. Cross sections show wavy, concentric bands with occasional cone-shaped nodes bounded by bright translucent areas (Thornton 1981).

Narwhal drawing

Synonyms and Related Terms

narwal; narwhale; narwhal ivory; sea univorn ivory

Other Properties

UV autofluorescence is buff and white.

Additional Information

J.Thornton, "The Structure of Ivory and Ivory Substitutes", AIC Preprints, Philadelphia, 1981, p.173-181

Sources Checked for Data in Record

• Oppi Untracht, Jewelry Concepts and Technology, Doubleday & Co., Inc., New York City, 1985

• The Dictionary of Art, Grove's Dictionaries Inc., New York, 1996 Comment: F.Minney 'Ivory'

• Benjamin Burack, Ivory and Its Uses, Charles E. Tuttle and Co., Vermont, 1984

• Hermann Kuhn, Conservation and Restoration of Works of Art and Antiquities, Butterworths, London, 1986

• Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997

• The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998