General Information:
Chemical Formula:
CaMn+++6Si3O16·7(H2O)
Composition:
(Molecular Weight = 781.12 gm)
Calcium 5.13 % Ca
Manganese 35.17 % Mn
Silicon 10.79 % Si
Hydrogen 1.81 % H
Oxygen 47.11 % O
Empirical Formula:
CaMn3+5Si3O16·7(H2O)
IMA Status:
Approved IMA 1982
Locality:
Franklin and Sterling Hill, New Jersey, USA.
Name Origin:
Named for Richard C. Bostwick (1943-), collector and compiler of data on Franklin and Sterling Hill, NJ mineralogy, particularly fluorescent species.
Physical Properties:
Color:
dark red.
Density:
2.93
Habits:
Divergent - Crystals radiate from a center without producing stellar forms., Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).,
Hardness:
1 - Talc
Luster:
Vitreous - Metallic
Streak:
red
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