Alexandrite Vs Sillimanite
Origin
Russia, Brazil, Tanzania, Madagascar, Zambia, Sri Lanka, Burma, India, Origins: Russia
USA, Madagascar, India, Sri Lanka, Burma, Australia, Italy, Brazil
Color
Green
Blue, Green, Brownish, Greenish, Colorless, gray
For which Rashi?
Scorpio
-
Element of Planets
Earth
-
Specific Gravity
3.69-3.81
3.20-3.26
Cleavage
1,1 ; 3,2.
{010} perfect
Chemical Composition
BeAl 2 O 4
Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
Luster
Vitreous
Vitreous, Subadamantine, Silky
Pleochroism
-
Colourless to pale brown to yellow
Transparency
Transparent, Transparent to nearly opaque
Transparent, Translucent
Refractive Index
1.739-1.770
1.653-1.685
Optic Character
Biaxial/+
-
Crystal System
Orthorhombic
Orthorhombic
Birefringence
0.007-0.010
0.020-0.022
Clarity
Transparent
Transparent
Neurological
Enhances mental clarity and focus
-
Cardiovascular
Aids in grounding and protection
-
Respiratory
Excellent
Good
Reproductive
Supports reproductive health
-
Psychology
Transformation
Creativity
Healing
Emotional healing
Emotional healing
Qualities Associated
Transformation
Creativity
Alexandrite Vs Sillimanite Fracture
Fracture is an important parameter when you compare Alexandrite and Sillimanite Physical Properties. It is necessary to understand the significance of these properties, before you compare Alexandrite Vs Sillimanite 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. Sillimanite fracture is Splintery.
Alexandrite Vs Sillimanite Luster
A primary knowledge about Alexandrite vs Sillimanite 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. Alexandrite exhibits Vitreous luster. Sillimanite, on other hand, exhibits Vitreous, Subadamantine and Silky luster.