Dumortierite Vs Blue John
Origin
Southern and central Africa
-
Color
Blue, Violet, Brown, White, Greenish, pink
White, Colorless, Blue, Red, Green, Yellow, Violet
For which Rashi?
Leo, Sagittarius
-
Element of Planets
Water
-
Specific Gravity
3.26-3.41
3.00-3.25
Fracture
Fibrous, ConchoidalWalter Schumann
-
Cleavage
Distinct on {100}, poor on {110}; parting on {001}
Perfect
Mohs Hardness
7-8.5
-9999
Chemical Composition
AlAl6O3BSi3O18
CaF 2Michael OâDonoghue , Gems, Sixth Edition (2006)
Pleochroism
Strong; X = deep blue or violet; Y = yellow to red-violet or nearly colorless; Z = colorless or very pale blue
-
Transparency
Translucent, Translucent to opaque
Transparent
Refractive Index
1.669-1.723
1.432-1.436
Crystal System
Orthorhombic
-
Birefringence
0.011-0.037
-9999
Clarity
Translucent
Transparent
Neurological
Enhances mental clarity and focus
Enhances mental clarity and focus
Cardiovascular
-
Supports heart health
Respiratory
Good
Excellent
Psychology
Patience
Harmony
Healing
Emotional healing
Emotional healing
Qualities Associated
Patience
Mental Clarity
Dumortierite Vs Blue John Fracture
Fracture is an important parameter when you compare Dumortierite and Blue John Physical Properties. It is necessary to understand the significance of these properties, before you compare Dumortierite Vs Blue John 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 Dumortierite is Fibrous and ConchoidalWalter Schumann.
Dumortierite Vs Blue John Luster
A primary knowledge about Dumortierite vs Blue John 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. Dumortierite exhibits Vitreous luster.