Origin
Australia, Southern and central Africa, green, brown, Australia, France, green, brown, Australia, France
Southern and central Africa, violet, blue, violet, blue
Color
Green, Colorless, gray, Yellow, White
Blue, Violet, Brown, White, Blue, Brown, Violet, Greenish, pink
For which Rashi?
Libra
Leo, Sagittarius, Leo, Sagittarius, Leo, Sagittarius
Element of Planets
Earth
Water
Finger
Not Available
Not Available
Ring Metal
Not Available
Not Available
Energy
Receptive
Receptive
Not to wear with
Not Available
Not Available
Powers
Not Available
Healing
Planetary
Not Available
Not Available
Talisman
Not Available
Not Available
Tenacity
Brittle
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.80-2.95
3.26-3.41
Fracture
Uneven, Yellow, White, UnevenWalter Schumann, Gemstones of the world (2001) More from other references, Brittle, Metallic
Fibrous, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references
Cleavage
Distinct on [001]
Distinct on {100}, poor on {110}; parting on {001}
Mohs Hardness
6-6.5
7-8.5
Chemical Composition
Ca2Al2Si3O12(OH)
AlAl6O3BSi3O18
Pleochroism
AbsentWalter Schumann
Strong; X = deep blue or violet; Y = yellow to red-violet or nearly colorless; Z = colorless or very pale blue
Transparency
Translucent
Translucent, Translucent to opaque
Refractive Index
1.611-1.673
1.669-1.723
Optic Character
Not Available
Not Available
Crystal System
Orthorhombic
Orthorhombic
Birefringence
0.021-0.033
0.011-0.037
Clarity
TranslucentHerve Nicolas Lazzarelli
Translucent
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
Prehnite Vs Dumortierite Fracture
Fracture is an important parameter when you compare Prehnite and Dumortierite Physical Properties. It is necessary to understand the significance of these properties, before you compare Prehnite Vs Dumortierite 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 Prehnite is Brittle, Gemstones of the world (2001) More from other references, Metallic, Uneven, UnevenWalter Schumann, White and Yellow. Dumortierite fracture is ConchoidalWalter Schumann, Fibrous and Gemstones of the world (2001) More from other references.
Prehnite Vs Dumortierite Luster
A primary knowledge about Prehnite vs Dumortierite 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. Prehnite exhibits Vitreous luster. Dumortierite, on other hand, exhibits Vitreous luster.