yugawaralite
yugawaralite crystals from Bombay in India
CHEMICAL CHARACTERISTICS
CaAl2[Si6O16] - 4H2O
calcium hydrated alumino-silicate
PHYSICAL CHARACTERISTICS
Main color
colourless
Other colors
white, pink
Color of streak
white
Luster
vitreous
Hardness
4.5 to 0.0
Density
2.18 to 2.25
Cleavage
indistinct
Fracture
conchoidal
OPTICAL PROPERTIES
Transparency
translucent, transparent
Refractive index
1.490 - 1.510
Double refraction
0.010
weak, biaxial (+)
visible double refraction
No
Dispersion
-
Pleochroism
absent
Number of colors
1
Fluorescence
none
CRYSTALS PROPERTIES
elongated flattened prisms
crystals system
monoclinic
OTHER INFORMATIONS
APPROACHING GEMS
Exploited
sites
It is found in Iceland, Argentina, Japan, India (Poona), United States (Alaska and Wyoming).
use in jewelry
only a collection stone
Other
Gems
Venez visitez
notre site web
voillot-joaillier.fr
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