General Information:
Chemical Formula:
Ca2B5SiO9(OH)5
Composition:
(Molecular Weight = 391.32 gm)
Calcium 20.48 % Ca
Silicon 7.18 % Si
Boron 13.81 % B
Hydrogen 1.29 % H
Oxygen 57.24 % O
Empirical Formula:
Ca2B5SiO9(OH)5
Environment:
Secondary mineral in arid environments.
Locality:
Tick Canyon, Los Angeles Co., California.
Name Origin:
Named after Henry How of Nova Scotia when he first described it in 1868.
Physical Properties:
Cleavage:
None
Color:
colorless or white.
Density:
2.58
Diaphaniety:
Translucent
Habits:
Nodular - Tuberose forms having irregular protuberances over the surface., Earthy - Dull, clay-like texture with no visible crystalline affinities, (e.g. howlite)., Massive - Uniforml y indistinguishable crystals forming lar
Hardness:
2.5-3.5 - Finger Nail-Copper Penny
Luminescence:
Non-fluorescent.
Luster:
Earthy (Dull)
Streak:
white
More details...