Origin
Australia
  
Southern and central Africa
  
Color
Yellow, Green, Blue
  
Brown, Brown, Green, Green, gray, White
  
Streak
Not Available
  
gray, White, gray, White
  
For which Rashi?
Not Available
  
Not Available
  
Planet
Not Available
  
Not Available
  
Element of Planets
Not Available
  
Not Available
  
How to Wear?
  
  
Finger
Not Available
  
Not Available
  
Ring Metal
Not Available
  
Not Available
  
Energy
Not Available
  
Not Available
  
Deities
Not Available
  
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
1.98-2.25
  
3.15-3.259
  
Fracture
Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references
  
Not Available
  
Cleavage
Not Available
  
Gedrite Magnesiogedrite , Comments: Dark gray cleavage fragment of magnesiogedrite (gedrite). , Location: Bamble, Telemark, Norway. , Scale: See Image.
  
Mohs Hardness
5-6.5
  
5.5-6
  
Chemical Composition
SiO 2 · nH 2OGemdat.org , Management Team (2012)
  
(Mg,Fe2+ ) 2[(Mg,Fe2+ ) 3Al 2](Si 6Al 2)O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)
  
Luster
Not Available
  
Fibrous, Vitreous
  
Pleochroism
AbsentWalter Schumann
  
Weak to moderate
  
Dispersion
None
  
Not Available
  
Transparency
Transparent, Translucent
  
Transparent
  
Refractive Index
1.370-1.470
  
1.625-1.718
  
Optic Character
Not Available
  
Not Available
  
Crystal System
Not Available
  
Orthorhombic Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P nma
  
Birefringence
Not Available
  
Not Available
  
Clarity
Transparent
  
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
  
Precious Opal Vs Gedrite Fracture
Fracture is an important parameter when you compare Precious Opal and Gedrite Physical Properties. It is necessary to understand the significance of these properties, before you compare Precious Opal Vs Gedrite 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 Precious Opal is Conchoidal, Conchoidal and Gemstones of the world (2001) More from other references.
Precious Opal Vs Gedrite Luster
A primary knowledge about Precious Opal vs Gedrite 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. Gedrite, on other hand, exhibits Fibrous and Vitreous luster.