euclase
oval cut euclase from Brazil
blue euclase crystal from Colombia
solid like inclusions, striped negative volume
color like inclusion
solid like inclusions
solid like inclusion, certainly the internal growth of a small euclase crystal
Detailed sheet
euclase
Because of its perfect cleavage it is so named from the Greek “eu” for easy and “klasis” for breaking. It breaks into strips very easily. Colorless in general, it is in its blue variety that is mostly sought.
CHEMICAL CHARACTERISTICS
BeAl[SiO4](OH)
beryllium aluminum silicate mineral
PHYSICAL CHARACTERISTICS
Main color
blue
Other colors
colourless, yellow, green, purple
the most sought are blue, then colorless to blue-black
Color of streak
white
Luster
vitreous
Hardness
7.5 to 0.0
Density
3.05 to 3.20
Cleavage
perfect
Fracture
uneven
its cleavage makes it fragile
OPTICAL PROPERTIES
Transparency
transparent
Refractive index
1.650 - 1.678
Double refraction
0.020
definite, biaxial positive
visible double refraction
Yes
Dispersion
0.016(0.009)
Pleochroism
very weak
Number of colors
3
light green, green yellow, green - blue
Absorption spectrum
706 - 704 - 650 - 639
Fluorescence
none
Inclusions
gas bubbles in liquid-filled cavities and black inclusions
CRYSTALS PROPERTIES
slender prisms
crystals system
monoclinic
OTHER INFORMATIONS
Astrological sign
Gemini, Libra
APPROACHING GEMS
Exploited
sites
It occurs in pegmatites, in geodes in Austria (alpine slots), Colombia, Brazil (Minas Gerais), Russia (Urals), India, Rhodesia, Tanzania, Zaire, Zimbabwe, China for its yellow variety.
use in jewelry
The mineral is sought after by collectors especially if it is transparent and colored in blue or deep yellow, but it’s virtually impossible to cut because of its cleavage.
Daily care
and precautions
more than sensitive to shocks, very fragile
imitations and
treatments
can be colored in blue by radiation
Historical
healing properties
His influences are very similar to those of aquamarine, meaning uprightness, honesty, imposing a strict life, helping to generosity.
Other
Gems
Venez visitez
notre site web
voillot-joaillier.fr
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