FOV 5mm / Pentax K-7 + NY-1S + Meiji EMF-2P/10
Hexahydroborite
on Shimazakiite
Ca[B(OH)
4
]
2
･2H
2
O
4th Ceiling Exposure, Fuka Mine, Fuka, Okayama pref., Japan
岡山県川上郡備中町布賀 布賀鉱山4番坑F-13
