chondrodite
chondrodite crystal from Kafveltorp in Sweden
chondrodite crystals on calcite from Mogok in Burma
Detailed sheet
chondrodite
Discovered in 1817, its name comes from the Greek “chondros” which means grain in connection with its well-formed crystals, isolated in the form of grains.
CHEMICAL CHARACTERISTICS
(Mg,Fe)5[SiO4]2(F,OH)2
iron - magnesium fluoride silicate
PHYSICAL CHARACTERISTICS
Main color
yellow
Other colors
brown, orange, red, green
Color of streak
brown, yellow
Luster
resinous, vitreous
Hardness
6.0 to 6.5
Density
3.15 to 3.26
Cleavage
indistinct
Fracture
conchoidal
cleavage only on one axe
OPTICAL PROPERTIES
Transparency
translucent, transparent
Refractive index
1.592 - 1.646
Double refraction
0.028
definite, biaxial positive
visible double refraction
Yes
Dispersion
+
Pleochroism
definite
Number of colors
2
yellow brown, green
Fluorescence
moderate
orange
CRYSTALS PROPERTIES
well shaped
crystals system
monoclinic
OTHER INFORMATIONS
APPROACHING GEMS
Exploited
sites
It is found at the Palabora mine in South Africa, in Rajasthan in India, on the Isle of Skye in Scotland, in the Urals in Russia, China, in the Aosta Valley in Italy, the United States (Colorado, Arizona, California, Pennsylvania, Alaska) and Mogok in Burma.
use in jewelry
it is faceted and it’s a collection stone
Other
Gems
Venez visitez
notre site web
voillot-joaillier.fr
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