hodgkinsonite
hodgkinsonite crystals from New Jersey in U.S.
Detailed sheet
hodgkinsonite
Discovered in 1913, its name honors H.H.Hodgkinson of the Franklin Mine in New Jersey, United States, where it was discovered.
CHEMICAL CHARACTERISTICS
MnZn2[SiO4](OH)2
zinc manganese silicate mineral
PHYSICAL CHARACTERISTICS
Main color
red
Other colors
brown, orange, pink
brown, pink, orange
Color of streak
white
Luster
vitreous
Hardness
4.5 to 5.0
Density
3.90 to 4.00
Cleavage
perfect
Fracture
conchoidal
OPTICAL PROPERTIES
Transparency
opaque, translucent
Refractive index
1.719 - 1.748
Double refraction
0.022
definite, biaxial (-)
visible double refraction
Yes
Dispersion
-
Pleochroism
variable
Number of colors
2
colorless, colored
Fluorescence
weak
pink, violet
CRYSTALS PROPERTIES
prismatic
crystals system
monoclinic
OTHER INFORMATIONS
APPROACHING GEMS
Exploited
sites
Rare mineral, its main source is Franklin Mine in New Jersey in the United States.
use in jewelry
cut for collection
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