![barytocalcite crystals of Mont St.-Hilaire, Canada](https://www.patrickvoillot.com/wp-content/uploads/2021/03/barytocalcite-cristaux-mont-saint-hilaire-canada239-150x150.png)
![](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
Ca3Cr3[SiO4]3
chromium and calcium 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
green
emerald green
Color of streak
white
Luster
vitreous
Hardness
6.5 to 7.5
Density
3.77 to 0.00
Cleavage
indistinct
Fracture
conchoidal, uneven
![](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
rarely transparent
Refractive index
1.870 - 0.000
Double refraction
0.000
none, isotropic, but sometimes rocks exhibit a polarization anomaly
visible double refraction
No
Dispersion
0.027(0.014)
Pleochroism
absent
Number of colors
1
isotropic
![](https://www.patrickvoillot.com/wp-content/uploads/2021/03/spectre-absorption-ouvarovite.jpg)
uvarovite spectrum system
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
very small but well shaped hexoctahedra, dodecahedra
![](https://www.patrickvoillot.com/wp-content/uploads/2021/03/cristal-grenat.gif)
crystals system
cubic
![](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
Astrological sign
Sagittarius, Virgo
![](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 France (Pyrenees), Russia (Urals), Canada, United States (California), Madagascar, Finland, India (Himalayas), Poland.
use in jewelry
limited because little transparent, it’s a collection stone
imitations and
treatments
Imitated by green garnet / glass doublets in a rather misleading way
Venez visitez
notre site web
voillot-joaillier.fr
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