Williamsite Vs Sillimanite
Origin
Southern and central Africa
USA, Madagascar, India, Sri Lanka, Burma, Australia, Italy, Brazil
Color
Green
Blue, Green, Brownish, Greenish, Colorless, gray
Streak
Not Available
White
For which Rashi?
Not Available
Not Available
Planet
Not Available
Not Available
Element of Planets
Not Available
Not Available
Finger
Not Available
Not Available
Ring Metal
Not Available
Not Available
Energy
Not Available
Not Available
Deities
Not Available
Not Available
Not to wear with
Not Available
Not Available
Powers
Not Available
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
2.51-2.63
3.20-3.26
Fracture
Conchoidal, Conchoidal, Handbook of mineralogy (2001)
Splintery
Cleavage
Not Available
{010} perfect
Chemical Composition
(Mg,Fe2+ ) 3Si 2O 5(OH) 4Anthony et al , Handbook of mineralogy (2001)
Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
Luster
Waxy, Silky, Resinous, Greasy
Vitreous, Subadamantine, Silky
Pleochroism
Not Available
Colourless to pale brown to yellow
Dispersion
Not Available
Not Available
Transparency
TranslucentHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010)
Transparent, Translucent
Refractive Index
1.530-1.575
1.653-1.685
Optic Character
Not Available
Not Available
Crystal System
Not Available
Orthorhombic
Birefringence
Not Available
0.020-0.022
Clarity
TranslucentHerve Nicolas Lazzarelli
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
Williamsite Vs Sillimanite Fracture
Fracture is an important parameter when you compare Williamsite and Sillimanite Physical Properties. It is necessary to understand the significance of these properties, before you compare Williamsite 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 Williamsite is Conchoidal, Conchoidal and Handbook of mineralogy (2001). Sillimanite fracture is Splintery.
Williamsite Vs Sillimanite Luster
A primary knowledge about Williamsite 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. Williamsite exhibits Greasy, Resinous, Silky and Waxy luster. Sillimanite, on other hand, exhibits Silky, Subadamantine and Vitreous luster.