Origin
Canada, Southern and central Africa
  
Southern and central Africa
  
Color
Colorless, Red, orange, Brown, pink
  
Blue, Colorless, White
  
Streak
White
  
White
  
For which Rashi?
Not Available
  
Gemini, Virgo, Gemini, Virgo, Gemini, Virgo
  
Planet
Not Available
  
Moon
  
Element of Planets
Not Available
  
Earth
  
How to Wear?
  
  
Finger
Not Available
  
Not Available
  
Ring Metal
Not Available
  
Not Available
  
Energy
Not Available
  
Not Available
  
Deities
Not Available
  
Quan Yin
  
Not to wear with
Not Available
  
Not Available
  
Powers
Not Available
  
Not Available
  
Birthstone
  
  
Planetary
Not Available
  
Not Available
  
Talisman
Not Available
  
Not Available
  
Tenacity
Not Available
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.79
  
2.45-2.58
  
Fracture
Brittle, Metallic
  
UnevenArthur Thomas, Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal
  
Cleavage
{100} Perfect, {010} Perfect, {001} Perfect
  
None
  
Mohs Hardness
2
  
3-3.5
  
Chemical Composition
NaFUlrich Henn and Claudio C.
  
Ca 2B 5SiO 9(OH) 5Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
  
Luster
Not Available
  
Vitreous
  
Pleochroism
Yellow to pink/deep carmineMichael OâDonoghue
  
NilArthur Thomas
  
Dispersion
Not Available
  
Not Available
  
Transparency
Gemmological Tables (2004) More from other references
  
Gemmological Tables (2004) More from other references
  
Refractive Index
1.328-1.332
  
1.583-1.608
  
Optic Character
Not Available
  
Not Available
  
Crystal System
Not Available
  
monoclinic
  
Birefringence
Not Available
  
0.019
  
Clarity
TransparentUlrich Henn and Claudio C. Milisenda
  
Gemmological Tables (2004) More from other references
  
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
  
Villiaumite Vs Howlite Fracture
Fracture is an important parameter when you compare Villiaumite and Howlite Physical Properties. It is necessary to understand the significance of these properties, before you compare Villiaumite Vs Howlite 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 Villiaumite is Brittle and Metallic. Howlite fracture is Brittle, Conchoidal, Gemstones (2009), Gemstones (2009), UnevenArthur Thomas and UnevenArthur Thomas.
Villiaumite Vs Howlite Luster
A primary knowledge about Villiaumite vs Howlite 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. Howlite, on other hand, exhibits Vitreous luster.