Lapis lazuli Vs Omphacite
Origin
Afghanistan
  
Southern and central Africa
  
Color
Violet, Blue, White
  
Green
  
Streak
Blue
  
Greenish, White
  
For which Rashi?
Sagittarius
  
Not Available
  
Planet
Venus
  
Not Available
  
Element of Planets
Water
  
Not Available
  
How to Wear?
  
  
Finger
Not Available
  
Not Available
  
Ring Metal
Not Available
  
Not Available
  
Energy
Receptive
  
Not Available
  
Deities
Venus
  
Not Available
  
Not to wear with
Not Available
  
Not Available
  
Powers
Protection, Courage
  
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
2.50-3.00
  
3.16-3.43
  
Fracture
Uneven-Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001)
  
Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal
  
Cleavage
3,6
  
{110} Good, {110} Good
  
Mohs Hardness
5.5
  
5-6
  
Chemical Composition
The chief constituent Lapis Lazuli is Lazurite, with the following chemical formula: (Na,Ca)8Al6Si6O24(S,SO)4
  
(Ca,Na)(Mg,Fe,Al)Si 2O 6Anthony et al , Handbook of Mineralogy (2001)
  
Luster
Vitreous, Greasy
  
Vitreous
  
Pleochroism
AbsentWalter Schumann
  
Weak: colorless -- very pale green -- very pale green
  
Dispersion
None
  
Not Available
  
Transparency
Opaque
  
TranslucentAnthony et al, Handbook of mineralogy (2001)
  
Refractive Index
1.500-1.670
  
1.662-1.723
  
Optic Character
Not Available
  
Not Available
  
Crystal System
Trigonal
  
Not Available
  
Birefringence
Not Available
  
Not Available
  
Clarity
Gemstones of the world (2001)
  
TranslucentAnthony et al
  
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
  
Lapis lazuli Vs Omphacite Fracture
Fracture is an important parameter when you compare Lapis lazuli and Omphacite Physical Properties. It is necessary to understand the significance of these properties, before you compare Lapis lazuli Vs Omphacite 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 Lapis lazuli is ConchoidalWalter Schumann, Gemstones of the world (2001) and Uneven-Conchoidal. Omphacite fracture is Brittle, Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Uneven and Uneven.
Lapis lazuli Vs Omphacite Luster
A primary knowledge about Lapis lazuli vs Omphacite 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. Lapis lazuli exhibits Greasy and Vitreous luster. Omphacite, on other hand, exhibits Vitreous luster.