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