A large mass of pegmatitic nature with light green Elbaite, purple Lepidolite, Microcline and Cookeite (light brown). Cookeite is a chlorite group member with lithium and is typically found as a late stage alteration product probably by hydrothermal activity within granitic lithium-rich pegmatites.
Cookeite
Formula
(Al,Li)3Al2(Si,Al)4O10(OH)8
Crystal System
Monoclinic
Crystal Habit
Micaceous, Pseudo Hexagonal
Cleavage
Perfect, None, None
Luster
Vitreous (Glassy)
Color
white, green, brown, yellowish white, pinkish white
