|Color||Colorless, blue-green, blue, green, gray-green, brownish|
|Crystal Habit|| Prismatic|
|Crystal System|| Orthorhombic|
|Hardness||6.5 - 7.5 Mohs scale|
|Specific gravity||3.20 - 3.26|
|Refractive index||1.653 - 1.685|
|Birefringence||0.014 - 0.021|
Sillimanite is an Aluminosilicate mineral which is
composed of Aluminum, Silicon, Oxygen, and others. It is actually a polymorph
containing both Kyanite and Andalusite. Among the two of this Sillimanite is
the rarest form of the known gemstone but, neither it has any astrological
connection neither nor it is a birthstone. But according to mythology, wearing
Sillimanite will give you good vibes while wearing it can be helpful for old
aged people for healing purposes. Sillimanite is generally known for its cats
eye chatoyancy that is varying in color when seen in different lights or from
different angles. It also increases the number of buyers as well in the jewelry
trade for having that cats eye lookalike.
Its uses and purpose
can be used as a gemstone
imitation of Sillimanite can be made using dyes.
of the Sillimanite is used as refractory raw material in the industries. The
term refractory means that it will remain stable at all physical and chemical
in producing refractory bricks and gunning mixtures.
material of Sillimanite is used in the iron industry for furnaces, steel
degassing chambers, soaking pits.
is an important component that is present in the Sillimanite which remains
stable until the temperature is raised above 18000C therefore it used in the
manufacture of metals, glass ceramics, and cement.
is most commonly used for industrial purposes. It is the best material for
shaping other materials. It is believed that it protects the user from past,
present, and future bad effects and if used properly it can also improve eye
sight, cataracts, and other eye related problems.
can withstand high temperatures and is of great use in the iron industry for
the lining of furnaces.
Even though Sillimanite is highly cost effective it's
better not to compromise it with any other stone as it provides better results