apophyllite
apophyllite crystal from India
scolecite crystals on a crystal of green apophyllite from Brazil
Detailed sheet
apophyllite
It was identified in 1806 by René Just Haüy, its name comes from the Greek “apophylliso” which means “exfoliates”, “that flakes “ … to heat, friction, acid.
There are several varieties according to their chemical composition: rich in sodium, it is the natroapophyllite; rich in fluorine, it is the fluorapophyllite.
CHEMICAL CHARACTERISTICS
KCa4[(Si4O10]2 8H2O (F,OH)
complex phyllosilicate
PHYSICAL CHARACTERISTICS
Main color
colourless
Other colors
white, brown, grey, yellow, pink, red, green, purple
Color of streak
white
Luster
vitreous
Hardness
4.5 to 5.0
Density
2.30 to 2.50
Cleavage
perfect
Fracture
uneven
very easy cleavage, even too easy!
OPTICAL PROPERTIES
Transparency
transparent
Refractive index
1.535 - 1.538
Double refraction
0.002
very light, positive uniaxial
visible double refraction
No
Pleochroism
absent
Number of colors
1
Fluorescence
variable
some samples are yellow-orange fluoresecents
CRYSTALS PROPERTIES
double ending thick tabular and pseudo-cubic
crystals system
tetragonal
OTHER INFORMATIONS
Astrological sign
Gemini, Pisces, Virgo
APPROACHING GEMS
Exploited
sites
This is a fairly common stone. It is often found in cavities of basalt in India from where come beautiful green crystals, in France, Germany, Italy, Canada, Finland, Brazil, Sweden.
use in jewelry
its cleavage makes it very difficult to cut. Its softness makes it very fragile. It is not used in jewelry, however it is a beautiful collection stone
Daily care
and precautions
Sensitive to heat, acids, and shocks.
imitations and
treatments
No known imitations.
Historical
healing properties
This is the stone of the third eye chakra, it would act on memory, intellect, reflection. It would help to make sound and just choices by connecting the cosmic and the earthly. The green apophyllite is the stone of the heart chakra, it would allay the sick, would be the way to suppress both physical and psychological blocks . In China, it is said that apophyllite would promote the effectiveness of acupuncture treatments.
Other
Gems
Venez visitez
notre site web
voillot-joaillier.fr
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