Hauyne
Species (IMA name: Haüyne)
Rare · Na₃Ca(Si₃Al₃)O₁₂(SO₄)
A feldspathoid of alkaline volcanic rock, and one of the few minerals of a true cornflower blue. Crystals large enough to cut are almost confined to the Eifel lavas of Germany.
Identity
- Formula
- Na₃Ca(Si₃Al₃)O₁₂(SO₄)
- Chemical class
- Silicate
- Mineral group
- Lapis Lazuli, Lazurite, Sodalite
- Also known as
- Hauynite
Crystallography
- Crystal system
- Cubic
- Habits
- Dodecahedral, Granular, Massive
- Fracture
- Conchoidal
Physical properties
- Mohs hardness
- 5.5
- Density
- 2.45 g/cm³
- Luster
- Vitreous, Waxy
- Colors
- blue, green, red, yellow, gray
- Streak
- bluish white
- Transparency
- Transparent, Translucent
Geology
- Origins
- Volcanic
- Host rocks
- Volcanic rock
- Associated minerals
- Nepheline, leucite, sanidine, augite
- Found in
- Lapis Lazuli
- Geography
- Germany, Italy, USA
Classification
- Rarity
- Rare
- Gem quality
- Yes
Sources
- M. Pasero and others, IMA Commission on New Minerals, Nomenclature and Classification, The New IMA List of Minerals, updated September 2026. International Mineralogical Association (CNMNC), 2026.
- Haüyne. Mindat.org (Hudson Institute of Mineralogy).
- J. W. Anthony, R. A. Bideaux, K. W. Bladh, M. C. Nichols, Haüyne. Mineral Data Publishing, Handbook of Mineralogy, 2001.
- Haüyne. Gemdat.org (Hudson Institute of Mineralogy).
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