Formula : KCa2AlBe2[Si12O30] * H2O
System: hexagonal Hardness:5½-6 Rarity:rare
Strunz id:VIII/E.22-20 -
SILICATES
Name origin: Named by Kenngott (1870) for the Val Milà, Grischun, Switzerland, where the material of his first description was erroneously said to come from.
|