spessartine from Namibia oval cut
spessartine
mandarine spessartite crystal from Namibia
crystal of mandarine spessartite garnet from Tanzania
crystal spessartite garnet from Paistan
spessartite garnet crystal from China
spessartine garnet crystal from Navegadora Mine, Penha de Norte, Brasil
spessartine from Namibia oval cut
spessartine
Detailed sheet
spessartine
Its name comes from the cottage of Spessar sur- le -Main in Bavaria.
The finest ones come from Africa, in Namibia, from a recently discovered deposit that produced the famous “tangerine”garnets, of a very bright color and a beautiful shine, and that seems exhausted.
The “malaya”garnets: they are an intermediate between pyrope and spessartite and have the characteristic of changing color depending on the type of light: natural, incandescent: from orange to dark pink, it has been discovered in the 1990s (see pyrope).
CHEMICAL CHARACTERISTICS
Mn3Al2[SiO4]3
manganese and aluminum silicate
PHYSICAL CHARACTERISTICS
Main color
orange
Other colors
brown, red
all shades from orange
Color of streak
white
Luster
adamantine, vitreous
Hardness
6.5 to 7.5
Density
4.12 to 4.20
Cleavage
indistinct
Fracture
conchoidal, uneven
difficult cleavage
OPTICAL PROPERTIES
Transparency
transparent
Refractive index
1.790 - 1.820
Double refraction
0.000
zero, isotropic, sometimes stones exhibit a polarization anomaly
visible double refraction
No
Dispersion
0.027(0.015)
Pleochroism
absent
Number of colors
1
isotropic
Absorption spectrum
432 - 412
light orange spessartite spectrum system
orange spessartite spectrum system
Fluorescence
none
Inclusions
solid (apatite) and liquid, healing fissures
CRYSTALS PROPERTIES
hexoctahedral, dodecahedral
crystals system
cubic
OTHER INFORMATIONS
Astrological sign
Aquarius, Cancer, Sagittarius, Scorpio, Virgo
Month
january
APPROACHING GEMS
Exploited
sites
It is a garnet, we find some beautiful ones in Namibia (named mandarin garnet, or mandarine in French) but also in Burma, Pakistan, Brazil, China, United States, Kenya, Madagascar, Sri Lanka, Tanzania, Nigeria, from where beautiful stones, recalling the color of mandarin garnet from Namibia, come from, and are often confused with it.
Other
Gems
Venez visitez
notre site web
voillot-joaillier.fr
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