sinhalite
sinhalite crystals from Sri Lanka
yellow sinhalite from Sri Lanka emerald cut
solid and/or liquid inclusion
Detailed sheet
sinhalite
Discovered in 1952 in Sri Lanka and recognized as a specific mineral species, as previously mistaken for peridot.
Its name comes from the Sanskrit “Sinhala”, Ceylon, the ancient name of Sri Lanka. Stone of a good hardness.
CHEMICAL CHARACTERISTICS
MgAlBO4
magnesium and aluminum borate
PHYSICAL CHARACTERISTICS
Main color
brown
Other colors
yellow, pink, green
honey-colored, sometimes brown - greenish or pinkish
Color of streak
white
Luster
resinous, vitreous
Hardness
6.5 to 7.0
Density
3.45 to 3.50
Cleavage
none
Fracture
conchoidal
OPTICAL PROPERTIES
Transparency
transparent
Refractive index
1.665 - 1.712
Double refraction
0.035
definite, biaxial (-)
visible double refraction
Yes
Dispersion
0.018(0.010)
Pleochroism
definite
Number of colors
3
green, light brown, dark brown
Absorption spectrum
463
yellow sinhalite spectrum system
Fluorescence
none
CRYSTALS PROPERTIES
short prismatic, often not well shaped
crystals system
orthorhombic
OTHER INFORMATIONS
APPROACHING GEMS
Exploited
sites
The known deposits are in Burma, Tanzania, Canada (Quebec), Russia and of course Sri Lanka
use in jewelry
Is faceted and can be used to make rings. Currently little used but it has all the qualities of robustness to be used in jewelry.
Other
Gems
Venez visitez
notre site web
voillot-joaillier.fr
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