Detailed sheet

durangite

Found in 1869 owes its name to the site of Durango in Mexico



CHEMICAL CHARACTERISTICS

NaAl[AsO4]F

aluminium arsenate fluoride



PHYSICAL CHARACTERISTICS

Main color

orange

Other colors

yellow, red, green

Color of streak

yellow

Luster

vitreous

Hardness

5.0 to 5.5

Density

3.94 to 4.08

Cleavage

good

Fracture

uneven

cleavage only on one axe



OPTICAL PROPERTIES

Transparency

translucent

Refractive index

1.634 - 1.685

Double refraction

0.050

definite, biaxial (-)

visible double refraction

No

Dispersion

stark

Pleochroism

definite

Number of colors

2

colorless orange

Fluorescence

none



CRYSTALS PROPERTIES

prismatic

crystals system

monoclinic



OTHER INFORMATIONS

Exploited
sites

It is found in Lunenburg County – Nova Scotia, Canada, Cornwall, England and of course in Durango, Mexico.

use in jewelry

cut in facets it’s a nice collection stone with a very nice orange color

Other
Gems

Envie d’acquérir

une pierre certifiée ?

maximevoillotgems.com

Découvrez les pierres précieuses certifiées sélectionnées à la source par Maxime Voillot : saphirs, rubis, émeraudes, spinelles et pierres rares, disponibles à la vente sur maximevoillotgems.com.

Découvrir Maxime Voillot Gems
Shopping Cart