General Information:
Chemical Formula:
(K,Ba)2(Ti,Mg,Ca,Fe)4(Si,Al,Fe)6O14(OH)12
Environment:
Oxidizing conditions.
IMA Status:
Approved IMA 1987
Locality:
Diamond Jo quarry, Magnet Cove, near Hot Springs, Arkansas, USA.
Name Origin:
Named for Lourens Wals (1939-), a leading Belgian mineral collector.
Physical Properties:
Cleavage:
[001] Good
Color:
brownish gray or pearl gray.
Density:
3.17
Diaphaniety:
Translucent
Habits:
Rosette - Bundled tabular aggregates resembling rose flower petals., Pseudo Hexagonal - Crystals show a hexagonal outline.,
Luster:
Pearly
Streak:
gray white
More details...