Origin
Southern and central Africa
Spain, Brazil, USA, Sri Lanka, Burma, Origins: Spain, Burma. Discovered in Andalusia (Spain)
Color
Blue, Violet, Brown, White, Greenish, pink
Brown, pink, Violet, Yellow, Green, White, gray, Colorless, Red
For which Rashi?
Leo, Sagittarius
-
Element of Planets
Water
-
Specific Gravity
3.26-3.41
3.05-3.21
Fracture
Fibrous, ConchoidalWalter Schumann
Uneven, Subconchoidal, Splintery
Cleavage
Distinct on {100}, poor on {110}; parting on {001}
Good on {110}, poor on {100}
Chemical Composition
AlAl6O3BSi3O18
Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
Luster
Vitreous
Vitreous, Greasy
Pleochroism
Strong; X = deep blue or violet; Y = yellow to red-violet or nearly colorless; Z = colorless or very pale blue
strongly trichroic
Transparency
Translucent, Translucent to opaque
Transparent, Translucent
Refractive Index
1.669-1.723
1.627-1.650
Crystal System
Orthorhombic
Orthorhombic
Birefringence
0.011-0.037
0.009-0.010
Clarity
Translucent
Transparent
Neurological
Enhances mental clarity and focus
Enhances mental clarity and focus
Cardiovascular
-
Supports heart health
Respiratory
Good
Excellent
Psychology
Patience
Perception
Healing
Emotional healing
Physical healing
Qualities Associated
Patience
Self-Realization
Dumortierite Vs Andalusite Fracture
Fracture is an important parameter when you compare Dumortierite and Andalusite Physical Properties. It is necessary to understand the significance of these properties, before you compare Dumortierite Vs Andalusite 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. Andalusite fracture is Uneven, Subconchoidal and Splintery.
Dumortierite Vs Andalusite Luster
A primary knowledge about Dumortierite vs Andalusite 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. Andalusite, on other hand, exhibits Vitreous and Greasy luster.