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