Jet Vs Sillimanite
Origin
Spain
USA, Madagascar, India, Sri Lanka, Burma, Australia, Italy, Brazil
Color
Black
Blue, Green, Brownish, Greenish, Colorless, gray
Streak
Not Available
White
For which Rashi?
Capricorn
Not Available
Planet
Saturn
Not Available
Element of Planets
Earth
Not Available
Finger
Not Available
Not Available
Ring Metal
Not Available
Not Available
Energy
Receptive
Not Available
Deities
Cybele
Not Available
Not to wear with
Not Available
Not Available
Powers
Protection
Not Available
Planetary
Not Available
Not Available
Talisman
Not Available
Not Available
Tenacity
Not Available
Tough
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
1.19-1.35
3.20-3.26
Fracture
ConchoidalWalter Schumann, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references
Splintery
Cleavage
Not Available
{010} perfect
Mohs Hardness
2.5-4
6-7.5
Chemical Composition
Not Available
Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
Luster
Waxy
Vitreous, Subadamantine, Silky
Pleochroism
AbsentWalter Schumann
Colourless to pale brown to yellow
Dispersion
None
Not Available
Transparency
Gemmological Tables (2004) More from other references
Transparent, Translucent
Refractive Index
1.640-1.680
1.653-1.685
Optic Character
Not Available
Not Available
Crystal System
Amorphous
Orthorhombic
Birefringence
Not Available
0.020-0.022
Clarity
Gemmological Tables (2004) More from other references
Transparent
Neurological
Not Available
Not Available
Cardiovascular
Not Available
Not Available
Respiratory
Not Available
Not Available
Reproductive
Not Available
Not Available
Digestive
Not Available
Not Available
Psychology
Not Available
Not Available
Healing
Not Available
Not Available
Qualities Associated
Not Available
Not Available
Jet Vs Sillimanite Fracture
Fracture is an important parameter when you compare Jet and Sillimanite Physical Properties. It is necessary to understand the significance of these properties, before you compare Jet 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. Fracture observed in Jet is ConchoidalWalter Schumann, ConchoidalWalter Schumann and Gemstones of the world (2001) More from other references. Sillimanite fracture is Splintery.
Jet Vs Sillimanite Luster
A primary knowledge about Jet 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. Jet exhibits Waxy luster. Sillimanite, on other hand, exhibits Silky, Subadamantine and Vitreous luster.