cacoxenite
Cacoxenite crystals from Brazil in inclusion in quartz
Cacoxenite crystals from Brazil in inclusion in quartz
Detailed sheet
cacoxenite
Identified in 1825 in Bohemia in iron deposits, its name comes from the Greek “kakos”, for bad, and “xenos”, for guest or stranger to indicate that its presence in the iron ore was not appreciated: this phosphate makes the metal iron ore work, harder.
The cacoxenite is appreciated as inclusions in the quartz from Brazilian amethysts, where it forms very fine inclusions.
CHEMICAL CHARACTERISTICS
Fe24Al[PO4]17O6 (OH)12 - 17 H2O
hydrated iron and aluminium phosphate
PHYSICAL CHARACTERISTICS
Main color
yellow
Other colors
brown, orange
Color of streak
yellow
Luster
silky
Hardness
3.0 to 4.0
Density
2.20 to 2.60
Cleavage
none
Fracture
uneven
small flat portions on the cleavage
OPTICAL PROPERTIES
Transparency
translucent
Refractive index
1.570 - 1.660
Double refraction
0.050
uniaxial positive
visible double refraction
No
Dispersion
-
Pleochroism
weak
Number of colors
2
shades from light yellow to orange
Fluorescence
none
Inclusions
it is what constitutes inclusions in other minerals
CRYSTALS PROPERTIES
most often included in other minerals such as quartz but also in acicular crystals forming fiber-radiated balls
crystals system
hexagonal
OTHER INFORMATIONS
APPROACHING GEMS
Exploited
sites
It is found in Brazil in Minas Gerais, the United States, Canada, Japan, Australia, Rwanda in Africa, England, Ireland, Slovakia, Czech Republic…
use in jewelry
When is found as inclusions in the amethyst or clear quartz, it is cut into cabochons or faceted.
Quartz containing the association cacoxénite, lepidocrocite and iron oxides such as hematite or goethite are sought by healers who attribute to it important properties.
Daily care
and precautions
its acicular crystals are very fragile
Historical
healing properties
It is considered a “shield stone” it would send back the negative waves to the source that issues them. It would thus protect from destabilization attempts and negative actions from the outside. Some even think it would be able to transform negative vibes in positive beneficial forces
Other
Gems
Venez visitez
notre site web
voillot-joaillier.fr
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