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A transparent to translucent colored Gemstone. Spodumene is composed of lithium aluminum silicate. It can occur as a colorless, gray, green (hiddenite), yellow, pink (kunzite), lavender, or gray crystals. Spudomenes are only found in granite pegmatites. They are mined in Sweden, Ireland, the Malagasy Republic, Brazil, Mexico, Canada, and the U.S. (South Dakota, California, North Carolina). Spudomene is used industrially as a source of Lithium. It is also used in the manufacture of Ceramics, Enamel, and Glass. It undergoes an irreversible expansion from its alpha to beta form at 900C.

Synonyms and Related Terms

hiddenite (green); kunzite (pink to lavender); triphane;  Kunzit, Spodumen (Deut.); espodúmeno (Esp.); spodumen (Pol.); espodumena (Port.); spodumen (Ned.); spudomene (sp.)

Physical and Chemical Properties

  • Monoclinic system with flat, prismatic, striated crystals.
  • Cleavage is good in one direction (87 degrees)
  • Fracture = uneven and splintery.
  • Luster = vitreous to pearly.
  • Streak = white.
Composition LiAlSi2O6
Mohs Hardness 6.5 - 7.0
Density 3.13 - 3.20 g/ml
Refractive Index 1.648 - 1.679

Resources and Citations

  • Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
  • Robert Fournier, Illustrated Dictionary of Practical Pottery, Chilton Book Company, Radnor, PA, 1992
  • C.W.Chesterman, K.E.Lowe, Audubon Society Field Guide to North American Rocks and Minerals, Alfred A. Knopf, New York, 1979
  • Van Nostrand's Scientific Encyclopedia, Douglas M. Considine (ed.), Van Nostrand Reinhold, New York, 1976
  • 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

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