Howlite Vs Nepheline
Origin
Southern and central Africa
  
Canada
  
Color
Blue, Colorless, White
  
White, Reddish, gray, Brown, Brownish
  
Streak
White
  
White
  
For which Rashi?
Gemini, Virgo, Gemini, Virgo, Gemini, Virgo
  
Not Available
  
Planet
Moon
  
Not Available
  
Element of Planets
Earth
  
Not Available
  
How to Wear?
  
  
Finger
Not Available
  
Not Available
  
Ring Metal
Not Available
  
Not Available
  
Energy
Not Available
  
Not Available
  
Deities
Quan Yin
  
Not Available
  
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
2.45-2.58
  
2.55-2.65
  
Fracture
UnevenArthur Thomas, Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal
  
Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle
  
Cleavage
None
  
[1010] Poor
  
Mohs Hardness
3-3.5
  
5-6
  
Chemical Composition
Ca 2B 5SiO 9(OH) 5Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
  
Na 3(Na,K)Al 4Si 4O 16Ulrich Henn and Claudio C.
  
Luster
Vitreous
  
Vitreous, Greasy
  
Pleochroism
NilArthur Thomas
  
Not Available
  
Dispersion
Not Available
  
Not Available
  
Transparency
Gemmological Tables (2004) More from other references
  
Transparent, Translucent
  
Refractive Index
1.583-1.608
  
1.529-1.547
  
Optic Character
Not Available
  
Not Available
  
Crystal System
monoclinic
  
Hexagonal
  
Birefringence
0.019
  
0.003-0.004
  
Clarity
Gemmological Tables (2004) More from other references
  
Transparent
  
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
  
Howlite Vs Nepheline Fracture
Fracture is an important parameter when you compare Howlite and Nepheline Physical Properties. It is necessary to understand the significance of these properties, before you compare Howlite Vs Nepheline 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 Howlite is Brittle, Conchoidal, Gemstones (2009), Gemstones (2009), UnevenArthur Thomas and UnevenArthur Thomas. Nepheline fracture is Brittle, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009) and Subconchoidal.
Howlite Vs Nepheline Luster
A primary knowledge about Howlite vs Nepheline 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 exhibits Vitreous luster. Nepheline, on other hand, exhibits Greasy and Vitreous luster.