pumpellyite
cabochon of pumpellyite
cabochon of pumpellyite
pumpellyite cabochon
Detailed sheet
pumpellyite
Rare mineral found in the Carriere de la fleche, at Bertrix in the Ardennes, Belgium. We must speak of “pumpellyites” because there are some in which magnesium dominates, in others it is aluminum and yet in others it is iron, as shown here for this green colored stone
CHEMICAL CHARACTERISTICS
Ca2(Al,Fe,Mg)Al2[SiO4][Si2O7] (OH,O)2 - H2O
complex silicate
PHYSICAL CHARACTERISTICS
Main color
green
Other colors
white, blue, brown, grey, yellow
Color of streak
white
Luster
vitreous
Hardness
6.0 to 0.0
Density
3.20 to 3.30
Cleavage
perfect
Fracture
splintery, uneven
OPTICAL PROPERTIES
Transparency
translucent, transparent
Refractive index
1.675 - 1.722
Double refraction
0.013
weak, biaxial (+)
visible double refraction
No
Dispersion
+
Pleochroism
absent
Number of colors
1
Fluorescence
none
CRYSTALS PROPERTIES
fibrous acicular
crystals system
monoclinic
OTHER INFORMATIONS
APPROACHING GEMS
Exploited
sites
They are found in Russia, Japan, Ecuador, Chile, United States, Germany, England.
use in jewelry
polished to be cabochon cut
Historical
healing properties
It would be in connection with the heart chakra. It is given the power to reduce the fear before undertaking a long journey.
Other
Gems
Venez visitez
notre site web
voillot-joaillier.fr
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