Sillimanite Vs Alexandrite
Origin
USA, Madagascar, India, Sri Lanka, Burma, Australia, Italy, Brazil
Russia, Brazil, Tanzania, Madagascar, Zambia, Sri Lanka, Burma, India, Origins: Russia
Color
Blue, Green, Brownish, Greenish, Colorless, gray
Green
For which Rashi?
-
Scorpio
Element of Planets
-
Earth
Specific Gravity
3.20-3.26
3.69-3.81
Cleavage
{010} perfect
1,1 ; 3,2.
Chemical Composition
Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
BeAl 2 O 4
Luster
Vitreous, Subadamantine, Silky
Vitreous
Pleochroism
Colourless to pale brown to yellow
-
Transparency
Transparent, Translucent
Transparent, Transparent to nearly opaque
Refractive Index
1.653-1.685
1.739-1.770
Optic Character
-
Biaxial/+
Crystal System
Orthorhombic
Orthorhombic
Birefringence
0.020-0.022
0.007-0.010
Clarity
Transparent
Transparent
Neurological
-
Enhances mental clarity and focus
Cardiovascular
-
Aids in grounding and protection
Respiratory
Good
Excellent
Reproductive
-
Supports reproductive health
Psychology
Creativity
Transformation
Healing
Emotional healing
Emotional healing
Qualities Associated
Creativity
Transformation
Sillimanite Vs Alexandrite Fracture
Fracture is an important parameter when you compare Sillimanite and Alexandrite Physical Properties. It is necessary to understand the significance of these properties, before you compare Sillimanite Vs Alexandrite fracture. Whenever a gemstone chip breaks, it leaves a characteristic line along its breakage. Such lines are known as fracture and are used to identify the gemstones in their initial stages of production when they are in the form of rough minerals. Fracture is usually described with the terms “fibrous” and “splintery” to denote a fracture that usually leaves elongated and sharp edges. Fracture observed in Sillimanite is Splintery.
Sillimanite Vs Alexandrite Luster
A primary knowledge about Sillimanite vs Alexandrite luster is useful in apparent identifications of these gemstones. Luster is the measure of light that gets reflected when incident on a finished cut gemstone. There are two major types of lusters: Silky and Adamantine. Since luster varies between two crystals of even the same gemstone, luster is limited to basic identification criteria. Sillimanite exhibits Vitreous, Subadamantine and Silky luster. Alexandrite, on other hand, exhibits Vitreous luster.