![drop cabochon of charoite from Russia](https://www.patrickvoillot.com/wp-content/uploads/2021/03/charoite-cabochon-russie211-150x150.png)
![yugawaralite emerald cut](https://www.patrickvoillot.com/wp-content/uploads/2021/03/yugawaralite-taille-emeraude22-300x195.png)
yugawaralite
![yugawaralite crystals from Bombay in India](https://www.patrickvoillot.com/wp-content/uploads/2021/03/yugawaralite-critaux-bombay-inde-300x200.jpg)
yugawaralite crystals from Bombay in India
![](https://www.patrickvoillot.com/wp-content/uploads/2021/04/zoom-in.png)
![](https://www.patrickvoillot.com/wp-content/themes/astra-child/images/icon-image.png)
CHEMICAL CHARACTERISTICS
CaAl2[Si6O16] - 4H2O
calcium hydrated alumino-silicate
![](https://www.patrickvoillot.com/wp-content/uploads/2021/04/zoom-in.png)
![](https://www.patrickvoillot.com/wp-content/themes/astra-child/images/icon-image2.png)
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
![](https://www.patrickvoillot.com/wp-content/uploads/2021/04/zoom-in.png)
![](https://www.patrickvoillot.com/wp-content/themes/astra-child/images/icon-image3.png)
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
![](https://www.patrickvoillot.com/wp-content/uploads/2021/04/zoom-in.png)
![](https://www.patrickvoillot.com/wp-content/themes/astra-child/images/icon-image4.png)
CRYSTALS PROPERTIES
elongated flattened prisms
![](https://www.patrickvoillot.com/wp-content/uploads/2021/03/yugawaralite-cristal.gif)
crystals system
monoclinic
![](https://www.patrickvoillot.com/wp-content/uploads/2021/04/zoom-in.png)
![](https://www.patrickvoillot.com/wp-content/themes/astra-child/images/icon-image5.png)
OTHER INFORMATIONS
![](https://www.patrickvoillot.com/wp-content/uploads/2021/04/zoom-in.png)
![](https://www.patrickvoillot.com/wp-content/themes/astra-child/images/icon-image6.png)
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
Venez visitez
notre site web
voillot-joaillier.fr
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