Grandidierite Vs Thulite
Origin
Madagascar
  
Australia
  
Color
Green
  
Red
  
Streak
White
  
White, Colorless
  
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
2.85-3.00
  
3.1
  
Fracture
Brittle, UnevenArthur Thomas, Gemstones (2009), Brittle, Uneven
  
Uneven, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009)
  
Cleavage
Perfect
  
Perfect {010} imperfect {100}
  
Mohs Hardness
7.5
  
6-7
  
Chemical Composition
(Mg,Fe)Al 3(BO 4)(SiO 4)OUlrich Henn and Claudio C.
  
Ca2Al3(SiO4)3(OH)
  
Luster
Vitreous, Pearly
  
Vitreous
  
Pleochroism
visible
  
Present
  
Dispersion
Not Available
  
Not Available
  
Transparency
Gemmological Tables (2004) More from other references
  
Opaque, Translucent, Opaque . May be translucent in thin backlit sections.
  
Refractive Index
1.578-1.639
  
1.695
  
Optic Character
Not Available
  
Not Available
  
Crystal System
Orthorhombic
  
Orthorhombic
  
Birefringence
0.037-0.039
  
0.006-0.018
  
Clarity
Gemmological Tables (2004) More from other references
  
OpaqueHerve Nicolas Lazzarelli
  
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
  
Grandidierite Vs Thulite Fracture
Fracture is an important parameter when you compare Grandidierite and Thulite Physical Properties. It is necessary to understand the significance of these properties, before you compare Grandidierite Vs Thulite 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 Grandidierite is Brittle, Brittle, Gemstones (2009), Uneven and UnevenArthur Thomas. Thulite fracture is Conchoidal, ConchoidalArthur Thomas, Gemstones (2009) and Uneven.
Grandidierite Vs Thulite Luster
A primary knowledge about Grandidierite vs Thulite 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. Grandidierite exhibits Pearly and Vitreous luster. Thulite, on other hand, exhibits Vitreous luster.