Gageite

General Information:
 Chemical Formula:
(Mn,Mg,Zn)42Si16O54(OH)40
 Composition:
(Molecular Weight = 3,958.95 gm)
Magnesium 7.74 % Mg
Manganese 34.97 % Mn
Zinc 6.94 % Zn
Silicon 11.35 % Si
Hydrogen 1.02 % H 
Oxygen 37.99 % O 
 Empirical Formula:
Mn2+25.2Mg12.6Zn4.2Si16O54(OH)40
 Environment:
Metamorphosed zinc-manganese deposit.
 Locality:
Franklin, Sussex Co., New Jersey, USA.
Physical Properties:
 Color:
colorless or pink.
 Density:
3.41
 Diaphaniety:
Transparent
 Habits:
Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite), Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite),
 Luster:
Vitreous (Glassy)
 Streak:
white
More details...

General Information:
 Chemical Formula:
(Mn,Mg,Zn)42Si16O54(OH)40
 Composition:
(Molecular Weight = 3,958.95 gm)
Magnesium 7.74 % Mg
Manganese 34.97 % Mn
Zinc 6.94 % Zn
Silicon 11.35 % Si
Hydrogen 1.02 % H 
Oxygen 37.99 % O 
 Empirical Formula:
Mn2+25.2Mg12.6Zn4.2Si16O54(OH)40
 IMA Status:
Approved IMA (Dana # Added)
Physical Properties:
 Color:
colorless or pink.
 Density:
3.58
 Diaphaniety:
Transparent
 Habits:
Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite), Acicular - Occurs as needle-like crystals.,
 Luminescence:
Non-fluorescent.
 Luster:
Vitreous (Glassy)
More details...