![crystals of hedenbergite from Nordmarken Sweden](https://www.patrickvoillot.com/wp-content/uploads/2021/03/hedenbergite-cristaux-nordmarken-suede163-150x150.png)
![yellow komerupine form Sri Lanka oval cut](https://www.patrickvoillot.com/wp-content/uploads/2021/03/kornerupine-ovale-sri-lanka143-300x200.png)
kornerupine
![komerupine from Sri Lanka with chatoyancy](https://www.patrickvoillot.com/wp-content/uploads/2021/03/kornerupine-chatoyante-sri-lanka1-300x200.jpg)
komerupine from Sri Lanka with chatoyancy
![kornerupine crystal from Barakela in Madagascar](https://www.patrickvoillot.com/wp-content/uploads/2021/03/kornerupine-barakela-madagascar-300x200.jpg)
kornerupine crystal from Barakela in Madagascar
![African kornerupine emerald cut with inclusions](https://www.patrickvoillot.com/wp-content/uploads/2021/03/kornerupine-taille-emeraude-inclusions-300x200.jpg)
African kornerupine emerald cut with inclusions
![solid like inclusions](https://www.patrickvoillot.com/wp-content/uploads/2021/03/inclusions-kornerupine-verte-300x200.jpg)
solid like inclusions
![parallel growth tubes - type inclusion](https://www.patrickvoillot.com/wp-content/uploads/2021/03/inclusions-kornerupine-chromifere-300x200.jpg)
parallel growth tubes – type inclusion
Detailed sheet
kornerupine
Mineral honoring the young Danish geologist Andreas N. Kornerup (1857-1881) who discovered it in Greenland. Sometimes it can present a speckle of the type “cat eye”. Often brown and dark, beautiful yellow-green varieties are from Sri Lanka and it has now been discovered in emerald green colored varieties in Asia and in a light blue color (Tanzania and Sri Lanka).
![](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
Mg3Al6(Si,Al,B)5O21 (OH)
aluminum magnesium borosilicate
![](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
Other colors
blue, brown, colourless, yellow, mauve, pink, purple
Color of streak
white
Luster
greasy, vitreous
Hardness
6.5 to 7.0
Density
3.26 to 3.45
Cleavage
good
Fracture
conchoidal
easy cleavage
![](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
transparent
Refractive index
1.660 - 1.700
Double refraction
0.011
weak biaxial (-)
visible double refraction
No
Dispersion
0.018(0.010)
Pleochroism
strong
Number of colors
3
green, yellow, reddish brown
Absorption spectrum
503 - 446
![](https://www.patrickvoillot.com/wp-content/uploads/2021/03/spectre-absorption-kornerupine-vert-brun.jpg)
brown - green kornerupine spectrum system
Fluorescence
variable
rare yellow fluorescence
![](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 prisms in columnar aggregates or radiant
![](https://www.patrickvoillot.com/wp-content/uploads/2021/03/cristal-kornerupine.gif)
crystals system
orthorhombic
![](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 Greenland, South Africa, Burma, Canada, Kenya, Madagascar, Sri Lanka, Tanzania, Pakistan, Vietnam.
use in jewelry
The clear crystals are collection stones, it is cut in facets, it’s kind of resistant
Venez visitez
notre site web
voillot-joaillier.fr
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