Origin
USA, Madagascar, India, Sri Lanka, Burma, Australia, Italy, Brazil
Brazil, USA, Canada, Madagascar, Sri Lanka, India, Burma
Color
Blue, Green, Brownish, Greenish, Colorless, gray
Blue, Violet, Yellow, Grey
For which Rashi?
-
Libra, Sagittarius, Taurus
Element of Planets
-
Water
Specific Gravity
3.20-3.26
2.6-2.7
Cleavage
{010} perfect
3,1
Mohs Hardness
6-7.5
7-7.5
Chemical Composition
Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
Mg2Al4Si5O18
Luster
Vitreous, Subadamantine, Silky
Vitreous
Pleochroism
Colourless to pale brown to yellow
-
Transparency
Transparent, Translucent
Transparent, Translucent, Transparent to translucent
Refractive Index
1.653-1.685
1.52-1.56
Crystal System
Orthorhombic
Orthorhombic
Birefringence
0.020-0.022
-9999
Clarity
Transparent
Transparent to translucent
Neurological
-
Enhances mental clarity and focus
Cardiovascular
-
Supports heart health
Respiratory
Good
Excellent
Digestive
-
Supports digestive health
Psychology
Creativity
Intuition
Healing
Emotional healing
Emotional healing
Qualities Associated
Creativity
Intuition
Sillimanite Vs Iolite Fracture
Fracture is an important parameter when you compare Sillimanite and Iolite Physical Properties. It is necessary to understand the significance of these properties, before you compare Sillimanite Vs Iolite 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 Iolite Luster
A primary knowledge about Sillimanite vs Iolite 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. Iolite, on other hand, exhibits Vitreous luster.