Lazulite

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Lazulite

Description

A minor blue-green color gemstone composed of iron aluminum phosphate. Although its name has caused some confusion, it has no connection with lazurite, the main ingredient in lapis lazuli. Lazulite is a translucent stone that has been found in Switzerland (Zermatt), Austria, Sweden, Malagasy Republic, Brazil (Minas Gerais), Canada (Yukon), and the U.S.(California, Georgia). It was used for inlays on an amulet from the Oxxus Treasure (Ogden 1982).

Synonyms and Related Terms

Lazulit (Deut.)

Raman

LazuliteRS.jpg


Other Properties

Monoclinic system with bipyramidal crystals or grains. Good cleavage in one direction. Fracture = uneven. Luster = vitreous to dull. Streak = white.

Composition MgAl2(OH)2(PO4)2
Mohs Hardness 5.0 - 6.0
Density 3.0-3.4
Refractive Index 1.60; 1.63; 1.64

Additional Information

° J. Ogden, Jewelry of the Ancient World, Rizzoli International Publications, New York, 1982.

° Mineralogy Database: Lazulite

Comparisons

Properties of Common Gemstones


Sources Checked for Data in Record

  • Thomas Gregory, The Condensed Chemical Dictionary, Reinhold Publishing, New York, 3rd ed., 1942
  • Jack Odgen, Jewellery of the Ancient World, Rizzoli International Publications Inc., New York City, 1982
  • Encyclopedia Britannica, http://www.britannica.com Comment: "lazulite." Encyclopædia Britannica. 2005. Encyclopædia Britannica Premium Service 7 Apr. 2005 .
  • C.W.Chesterman, K.E.Lowe, Audubon Society Field Guide to North American Rocks and Minerals, Alfred A. Knopf, New York, 1979

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