Origin
Brazil, USA, Canada, Madagascar, Sri Lanka, India, Burma
Southern and central Africa
Color
Blue, Violet, Yellow, Grey
Blue, Violet, Brown, White, Greenish, pink
For which Rashi?
Libra, Sagittarius, Taurus
Leo, Sagittarius
Element of Planets
Water
Water
Specific Gravity
2.6-2.7
3.26-3.41
Fracture
-
Fibrous, ConchoidalWalter Schumann
Cleavage
3,1
Distinct on {100}, poor on {110}; parting on {001}
Mohs Hardness
7-7.5
7-8.5
Chemical Composition
Mg2Al4Si5O18
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, Transparent to translucent
Translucent, Translucent to opaque
Refractive Index
1.52-1.56
1.669-1.723
Crystal System
Orthorhombic
Orthorhombic
Birefringence
-9999
0.011-0.037
Clarity
Transparent to translucent
Translucent
Neurological
Enhances mental clarity and focus
Enhances mental clarity and focus
Cardiovascular
Supports heart health
-
Respiratory
Excellent
Good
Digestive
Supports digestive health
-
Psychology
Intuition
Patience
Healing
Emotional healing
Emotional healing
Qualities Associated
Intuition
Patience
Iolite Vs Dumortierite Fracture
Fracture is an important parameter when you compare Iolite and Dumortierite Physical Properties. It is necessary to understand the significance of these properties, before you compare Iolite 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.
Iolite Vs Dumortierite Luster
A primary knowledge about Iolite 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. Iolite exhibits Vitreous luster. Dumortierite, on other hand, exhibits Vitreous luster.