Mineralpedia Details for Eucryptite
Eucryptite
- Formula
- LiAlSiO4
- Crystal System
- Trigonal
- Cleavage
- Indistinct, None, None
- Luster
- Vitreous (Glassy)
- Color
- brown, colorless, white
- Streak
- white
- Class
- Trigonal - Rhombohedral
- Fracture
- Brittle - Conchoidal
- Hardness
- 6.5
- WebMineral
- View Eucryptite
- Mindat
- View Eucryptite
Eucryptite from Harding mine, Taos Co., New Mexico, United States
- Special Info
- Fluorescent
White, fine Eucryptite typically identified by association and fluorescence (deep red).
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Eucryptite from Branchville quarry, Branchville, Fairfield Co., Connecticut, United States
- Special Info
- Fluorescent
A thick plate of dull, white Eucryptite, best identified by its deep red fluorescences. The specimen was obtained by Hampson in 1961 from Gunnar Bjareby.
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Eucryptite from Bikita Pegmatite, Masvingo dist., Zimbabwe
- Special Info
- Illustrated in London's book "Pegmatites"
Intensely fluorescent crimson red Eucryptite.
Illustrated on page 56 of London's book on "Pegmatites".
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