Origin
Southern and central Africa, violet, blue, violet, blue
USA
Color
Blue, Violet, Brown, White, Blue, Brown, Violet, Greenish, pink
Brown, Red, Black, Brownish
Streak
White
Reddish, Brown, Reddish, Brown
For which Rashi?
Leo, Sagittarius, Leo, Sagittarius, Leo, Sagittarius
Not Available
Planet
Saturn
Not Available
Element of Planets
Water
Not Available
Finger
Not Available
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Ring Metal
Not Available
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Energy
Receptive
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Deities
Isis
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Not to wear with
Not Available
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Powers
Healing
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Planetary
Not Available
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Talisman
Not Available
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Tenacity
Not Available
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Solubility
Not Available
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Durability
Not Available
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Specific Gravity
3.26-3.41
5.05-5.22
Fracture
Fibrous, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references
Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001)
Cleavage
Distinct on {100}, poor on {110}; parting on {001}
None
Mohs Hardness
7-8.5
5.5-6
Chemical Composition
AlAl6O3BSi3O18
(Zn,Mn2+ ,Fe2+ )(Fe3+ ,Mn3+ ) 2O 4Anthony et al , Handbook of mineralogy (2001)
Luster
Vitreous
Not Available
Pleochroism
Strong; X = deep blue or violet; Y = yellow to red-violet or nearly colorless; Z = colorless or very pale blue
Not Available
Dispersion
None
Not Available
Transparency
Translucent, Translucent to opaque
Translucent
Refractive Index
1.669-1.723
Not Available
Optic Character
Not Available
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Crystal System
Orthorhombic
Isometric Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: F d3m
Birefringence
0.011-0.037
Not Available
Clarity
Translucent
Translucent
Neurological
Not Available
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Cardiovascular
Not Available
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Respiratory
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Reproductive
Not Available
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Digestive
Not Available
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Psychology
Not Available
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Healing
Not Available
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Qualities Associated
Not Available
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Dumortierite Vs Franklinite Fracture
Fracture is an important parameter when you compare Dumortierite and Franklinite Physical Properties. It is necessary to understand the significance of these properties, before you compare Dumortierite Vs Franklinite 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 ConchoidalWalter Schumann, Fibrous and Gemstones of the world (2001) More from other references. Franklinite fracture is ConchoidalAnthony et al, Handbook of mineralogy (2001), Uneven and Uneven.
Dumortierite Vs Franklinite Luster
A primary knowledge about Dumortierite vs Franklinite 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.