Origin
USA, Madagascar, India, Sri Lanka, Burma, Australia, Italy, Brazil
Canada, Pakistan
Color
Blue, Green, Brownish, Greenish, Colorless, gray
Reddish, Greenish, White, Red, Yellow, Green, Grey, Blue, Brown, Colorless, gray, orange
For which Rashi?
-
Virgo, Capricorn
Element of Planets
-
Earth
Specific Gravity
3.20-3.26
2.93-2.96
Fracture
Splintery
Subconchoidal, Conchoidal
Cleavage
{010} perfect
Distinct on {010}, imperfect {110} and {011}
Mohs Hardness
6-7.5
3.5-4
Chemical Composition
Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
CaCO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Luster
Vitreous, Subadamantine, Silky
Vitreous, Resinous
Pleochroism
Colourless to pale brown to yellow
StrongArthur Thomas
Transparency
Transparent, Translucent
Transparent, Translucent
Refractive Index
1.653-1.685
1.525-1.686
Crystal System
Orthorhombic
Orthorhombic
Birefringence
0.020-0.022
0.155
Clarity
Transparent
Transparent
Neurological
-
Promotes focus and concentration
Cardiovascular
-
Supports heart health
Psychology
Creativity
Stability
Healing
Emotional healing
Emotional healing
Qualities Associated
Creativity
Centering
Sillimanite Vs Aragonite Fracture
Fracture is an important parameter when you compare Sillimanite and Aragonite Physical Properties. It is necessary to understand the significance of these properties, before you compare Sillimanite Vs Aragonite 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. Aragonite fracture is Subconchoidal and Conchoidal.
Sillimanite Vs Aragonite Luster
A primary knowledge about Sillimanite vs Aragonite 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. Aragonite, on other hand, exhibits Vitreous and Resinous luster.