crystal size 2mm
Charlesite
Ca
6
(Al,Si)
2
(SO
4
)
2
B(OH)
4
(OH,O)
12
・ 26H
2
O
Fuka, Okayama pref., Japan
岡山県川上郡備中町布賀
A single incomplete crystal of Charlesite with a bit of matrix.
