serandite
serandite crystal of Mont Saint-Hilaire in Canada
serandite crystal of Mont Saint-Hilaire in Canada
orange cabochon of serandite from Quebec (Canada)
CHEMICAL CHARACTERISTICS
(Na,Mn,Ca)2[Si3O8](OH)
manganese, calcium and sodium silicate,
PHYSICAL CHARACTERISTICS
Main color
orange
Other colors
brown, pink
salmon pink shades
Color of streak
white
Luster
greasy, vitreous
Hardness
4.0 to 4.5
Density
3.32 to 0.00
Cleavage
perfect
Fracture
uneven
pearly on the cleavage
OPTICAL PROPERTIES
Transparency
translucent, transparent
Refractive index
1.660 - 1.688
Double refraction
0.028
definite, biaxial positive
visible double refraction
Yes
Dispersion
très faible
Pleochroism
absent
Number of colors
1
Fluorescence
none
CRYSTALS PROPERTIES
prismatic, acicular
crystals system
triclinic
OTHER INFORMATIONS
APPROACHING GEMS
Exploited
sites
It is found in the Rouma island, in Guinea, where it was discovered, Namibia, South Africa, Australia, Castagnola in Tuscany, Italy, Japan, but the most beautiful specimens come from Mont Saint-Hilaire in Canada.
use in jewelry
it is cut as a collection stone
Other
Gems
Envie d’acquérir
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