Origin
Ethiopia
  
Not Available
  
Color
Yellow, White, Red, Brown, Blue
  
Yellow, Black
  
Streak
White
  
Green
  
For which Rashi?
Cancer, Libra, Scorpio, Cancer, Libra, Scorpio, Cancer, Libra, Scorpio
  
Not Available
  
Planet
Mercury
  
Not Available
  
Element of Planets
Earth, Air, Water
  
Not Available
  
How to Wear?
  
  
Finger
Not Available
  
Not Available
  
Ring Metal
Not Available
  
Not Available
  
Energy
Projective, Receptive
  
Not Available
  
Deities
Cupid
  
Not Available
  
Not to wear with
Not Available
  
Not Available
  
Powers
Astral Projection, Psychicism
  
Not Available
  
Birthstone
  
  
Planetary
Not Available
  
Not Available
  
Talisman
Not Available
  
Not Available
  
Tenacity
BrittleWalter Schumann
  
Not Available
  
Solubility
hot salt water
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
1.98-2.25
  
4.39
  
Fracture
Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references, Brittle
  
ConchoidalGemdat.org, Uneven
  
Cleavage
None
  
{111} Indistinct, {111} Indistinct, {111} Indistinct
  
Mohs Hardness
5-6.5
  
7.5-8
  
Chemical Composition
SiO2 · nH2O
  
Fe2+ Al 2O 4Gemdat.org , Management Team (2012)
  
Luster
Vitreous, Pearly
  
Vitreous
  
Pleochroism
None
  
Not Available
  
Dispersion
None
  
Not Available
  
Transparency
Transparent, Translucent, Transparent to translucent
  
Translucent
  
Refractive Index
1.37-1.52
  
1.80-1.83
  
Optic Character
Not Available
  
Not Available
  
Crystal System
Trigonal
  
Isometric Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: F d3m
  
Birefringence
Not Available
  
Not Available
  
Clarity
Transparent
  
Translucent
  
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
  
Opal Vs Hercynite Fracture
Fracture is an important parameter when you compare Opal and Hercynite Physical Properties. It is necessary to understand the significance of these properties, before you compare Opal Vs Hercynite 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 Opal is Brittle, Conchoidal, Conchoidal and Gemstones of the world (2001) More from other references. Hercynite fracture is ConchoidalGemdat.org and Uneven.
Opal Vs Hercynite Luster
A primary knowledge about Opal vs Hercynite 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. Opal exhibits Pearly and Vitreous luster. Hercynite, on other hand, exhibits Vitreous luster.