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Hauyne - Laach lake volcanic complex, Eifel Mts, Rhineland-Palatinate, Germany
(#:MINS7903)
Cluster featuring several deep blue masses of Hauyne scattered on matrix. Some of the Hauyne spots show the best vitreous translucency and top electric blue colour. Classic european locale!
Formula :
(Na,Ca)
4-8
[Al
6
Si
6
(O,S)
24
](SO
4
,Cl)
1-2
System:
cubic
Hardness:
5½-6
Rarity:
rare
Strunz id:VIII/J.11-30 - 8 : Silicates
Name origin:
Named for Rene Just Haüy (1743-1822), French pioneer in crystallography. Sodalite Group.
Specimen weight:47 gr.
Crystal size:Up to 2 mm
Overall size: 55mm x 40 mm x 28 mm
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