![oval cut danburite from Mexico](https://www.patrickvoillot.com/wp-content/uploads/2021/03/danburite-mexique-taille-ovale196-150x150.png)
![legrandite emerald cut](https://www.patrickvoillot.com/wp-content/uploads/2021/03/legrandite-taille-emeraude134-300x211.png)
legrandite
![yellow legrandite from Ojuela Mine, Mapimi, Mexico](https://www.patrickvoillot.com/wp-content/uploads/2021/03/legrandite-ojuela-mapimi-mexique-300x200.jpg)
yellow legrandite from Ojuela Mine, Mapimi, Mexico
Detailed sheet
legrandite
Identified in 1932 by Drugman and Hey, its name honors the Belgian mining engineer, Legrand.
![](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
Zn2[AsO4](OH) - H2O
hydrated zinc arsenate
![](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
yellow
Other colors
colourless, orange
Color of streak
white
Luster
vitreous
Hardness
4.5 to 5.0
Density
3.98 to 4.04
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
Refractive index
1.675 - 1.740
Double refraction
0.060
definite, biaxial (+)
visible double refraction
Yes
Dispersion
forte
Pleochroism
definite
Number of colors
2
colorless, yellow
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
thin prismatic, well shaped
![](https://www.patrickvoillot.com/wp-content/uploads/2021/03/cristal-legrandite.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
Rare mineral, it is found in Tsumeb, Namibia, in Australia at Broken Hill, at Sterling Mine in the United States and in Mexico: in Chihuahua and Durango, where fine specimens are found.
use in jewelry
cut in facets it’s a collection stone
Venez visitez
notre site web
voillot-joaillier.fr
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