Origin
USA, Madagascar, India, Sri Lanka, Burma, Australia, Italy, Brazil
  
Brazil
  
Color
Blue, Green, Brownish, Greenish, Colorless, gray
  
Black, Colorless, Green, Violet, White, Yellow, White, Colorless, Blue, Red, Green, Yellow, pink, Brown, Colorless, Violet, gray, Yellow
  
Streak
White
  
White
  
For which Rashi?
Not Available
  
Taurus, Capricorn, Sagittarius, Capricorn, Sagittarius
  
Planet
Not Available
  
Venus, Moon
  
Element of Planets
Not Available
  
Earth, Water
  
How to Wear?
  
  
Finger
Not Available
  
Not Available
  
Ring Metal
Not Available
  
Not Available
  
Energy
Not Available
  
Receptive
  
Deities
Not Available
  
Nerthus
  
Not to wear with
Not Available
  
Not Available
  
Powers
Not Available
  
Healing, Protection
  
Birthstone
  
  
Planetary
Not Available
  
Not Available
  
Talisman
Not Available
  
Not Available
  
Tenacity
Tough
  
Brittle
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3.20-3.26
  
2.65
  
Fracture
Splintery
  
Conchoidal, Conchoidal, Brittle, Gems
  
Cleavage
{010} perfect
  
{0110} Indistinct
  
Mohs Hardness
6-7.5
  
7
  
Chemical Composition
Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
  
SiO2
  
Luster
Vitreous, Subadamantine, Silky
  
Vitreous
  
Pleochroism
Colourless to pale brown to yellow
  
None
  
Dispersion
Not Available
  
Transparency
Transparent, Translucent
  
Transparent, Translucent, Transparent to translucent
  
Refractive Index
1.653-1.685
  
1.544-1.553
  
Optic Character
Not Available
  
Not Available
  
Crystal System
Orthorhombic
  
Trigonal
  
Birefringence
0.020-0.022
  
0.009
  
Clarity
Transparent
  
Opaque
  
Physical
  
  
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
  
Sillimanite Vs Quartz Fracture
Fracture is an important parameter when you compare Sillimanite and Quartz Physical Properties. It is necessary to understand the significance of these properties, before you compare Sillimanite Vs Quartz 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. Quartz fracture is Brittle, Conchoidal, Conchoidal and Gems.
Sillimanite Vs Quartz Luster
A primary knowledge about Sillimanite vs Quartz 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 Silky, Subadamantine and Vitreous luster. Quartz, on other hand, exhibits Vitreous luster.