Franklinite Vs Sillimanite
Origin
USA
USA, Madagascar, India, Sri Lanka, Burma, Australia, Italy, Brazil
Color
Brown, Red, Black, Brownish
Blue, Green, Brownish, Greenish, Colorless, gray
Streak
Reddish, Brown, Reddish, Brown
White
For which Rashi?
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Planet
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Element of Planets
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Finger
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Ring Metal
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Energy
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Deities
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Not to wear with
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Powers
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Planetary
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Talisman
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Tenacity
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Tough
Solubility
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Durability
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Specific Gravity
5.05-5.22
3.20-3.26
Fracture
Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001)
Splintery
Cleavage
None
{010} perfect
Mohs Hardness
5.5-6
6-7.5
Chemical Composition
(Zn,Mn2+ ,Fe2+ )(Fe3+ ,Mn3+ ) 2O 4Anthony et al , Handbook of mineralogy (2001)
Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
Luster
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Vitreous, Subadamantine, Silky
Pleochroism
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Colourless to pale brown to yellow
Dispersion
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Transparency
Translucent
Transparent, Translucent
Refractive Index
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1.653-1.685
Optic Character
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Crystal System
Isometric Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: F d3m
Orthorhombic
Birefringence
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0.020-0.022
Clarity
Translucent
Transparent
Neurological
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Cardiovascular
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Respiratory
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Reproductive
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Digestive
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Psychology
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Healing
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Qualities Associated
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Franklinite Vs Sillimanite Fracture
Fracture is an important parameter when you compare Franklinite and Sillimanite Physical Properties. It is necessary to understand the significance of these properties, before you compare Franklinite Vs Sillimanite 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 Franklinite is ConchoidalAnthony et al, Handbook of mineralogy (2001), Uneven and Uneven. Sillimanite fracture is Splintery.
Franklinite Vs Sillimanite Luster
A primary knowledge about Franklinite vs Sillimanite 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. Sillimanite, on other hand, exhibits Silky, Subadamantine and Vitreous luster.