gaylussite
Detailed sheet
gaylussite
Identified in 1826 in Venezuela, its name honors the French chemist Gay-Lussac (1778-1850).
CHEMICAL CHARACTERISTICS
Na2Ca[CO3]2 - 5H2O
hydrated calcium and sodium carbonate
PHYSICAL CHARACTERISTICS
Main color
white
Other colors
grey, colourless, yellow
Color of streak
white
Luster
vitreous
Hardness
2.5 to 3.0
Density
2.00 to 0.00
Cleavage
perfect
Fracture
conchoidal
OPTICAL PROPERTIES
Transparency
opaque, translucent
rarely transparent
Refractive index
1.442 - 1.522
Double refraction
0.080
strong biaxial (-)
visible double refraction
Yes
Dispersion
+
Pleochroism
absent
Number of colors
1
Fluorescence
weak
white - bluish
CRYSTALS PROPERTIES
tabular
crystals system
monoclinic
OTHER INFORMATIONS
APPROACHING GEMS
Exploited
sites
It is found in Italy (Tuscany), China, United States (California, Oregon, Nevada, Wyoming), Mongolia, Russia, Argentina and Venezuela, where she was discovered.
use in jewelry
only a collection stone, it is cabochon polished
Daily care
and precautions
Very fragile: it dehydrates to air and disintegrates in water.
Other
Gems
Venez visitez
notre site web
voillot-joaillier.fr
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