LithoCat

MineralTunellite
FormulaSrB6O9(OH)2 • 3H2O
Crystal FormMonoclinic/Prismatic [2/m]
CleavagePerfect on {100}, Distinct on {001}
ColorColorless, grayish white
Density2.4 – 2.4 g/cm3
DiaphaneityTransparent
Hardness2.5
LustreSub-Vitreous, Pearly
StreakWhite
Type Loc.U.S. Borax Mine, Kramer Borate dep., Boron, Kern Co., CA, USA
Dana 8 Class26.6.6.2
Strunz Class5/K.06-20
Mindatmindat.org
WebMineralWebMineral
ID316