Dumortierite Vs Astrophyllite
Origin
Southern and central Africa
Canada, Russia
Color
Blue, Violet, Brown, White, Greenish, pink
Brown, Yellow, Greenish, Brownish, Red
Streak
White
Brown, White
For which Rashi?
Leo, Sagittarius
-
Element of Planets
Water
-
Specific Gravity
3.26-3.41
3.2-3.4
Fracture
Fibrous, ConchoidalWalter Schumann
Uneven
Cleavage
Distinct on {100}, poor on {110}; parting on {001}
Perfect on [001] imperfect on [100]
Chemical Composition
AlAl6O3BSi3O18
(K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)
Luster
Vitreous
Greasy, Pearly
Pleochroism
Strong; X = deep blue or violet; Y = yellow to red-violet or nearly colorless; Z = colorless or very pale blue
Strong: X= deep red-orange Y= orange-yellow Z= lemon-yellow
Transparency
Translucent, Translucent to opaque
Translucent
Refractive Index
1.669-1.723
1.678-1.758
Crystal System
Orthorhombic
Triclinic
Birefringence
0.011-0.037
0.050
Clarity
Translucent
Translucent
Neurological
Enhances mental clarity and focus
Enhances mental clarity and focus
Cardiovascular
-
Supports heart health
Respiratory
Good
Excellent
Psychology
Patience
Self-Reflection
Healing
Emotional healing
Spiritual healing
Qualities Associated
Patience
Self-Reflection
Dumortierite Vs Astrophyllite Fracture
Fracture is an important parameter when you compare Dumortierite and Astrophyllite Physical Properties. It is necessary to understand the significance of these properties, before you compare Dumortierite Vs Astrophyllite 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. Astrophyllite fracture is Uneven.
Dumortierite Vs Astrophyllite Luster
A primary knowledge about Dumortierite vs Astrophyllite 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. Astrophyllite, on other hand, exhibits Greasy and Pearly luster.