Origin
Brazil, Madagascar, Zambia, Sri Lanka, Burma, Russia, USA, Afghanistan
USA
Color
Green, Blue, Yellow, Red, Brown, White, Colorless, Blue, Red, Green, Yellow, pink
Brown, Red, Black, Brownish
Streak
White
Reddish, Brown, Reddish, Brown
For which Rashi?
Libra
Not Available
Planet
Venus, Mars
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Element of Planets
Water
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Finger
Not Available
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Ring Metal
Not Available
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Energy
Projective
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Deities
Venus
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Not to wear with
Not Available
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Powers
Love, Courage
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Planetary
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Talisman
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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
2.85-3.35
5.05-5.22
Fracture
Uneven, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009)
Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001)
Mohs Hardness
7-7.5
5.5-6
Chemical Composition
Tourmaline is a series of several different minerals with unique chemical formulas. See The chemical formula of Tourmaline for details.
(Zn,Mn2+ ,Fe2+ )(Fe3+ ,Mn3+ ) 2O 4Anthony et al , Handbook of mineralogy (2001)
Luster
Vitreous
Not Available
Pleochroism
typically moderate to strong
Not Available
Transparency
Transparent, Translucent, Transparent to opaque
Translucent
Refractive Index
1.614-1.666
Not Available
Optic Character
Not Available
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Crystal System
Trigonal
Isometric Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: F d3m
Birefringence
0.014-0.040
Not Available
Clarity
Transparent
Translucent
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
Not Available
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Tourmaline Vs Franklinite Fracture
Fracture is an important parameter when you compare Tourmaline and Franklinite Physical Properties. It is necessary to understand the significance of these properties, before you compare Tourmaline 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 Tourmaline is Conchoidal, ConchoidalArthur Thomas, Gemstones (2009) and Uneven. Franklinite fracture is ConchoidalAnthony et al, Handbook of mineralogy (2001), Uneven and Uneven.
Tourmaline Vs Franklinite Luster
A primary knowledge about Tourmaline 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. Tourmaline exhibits Vitreous luster.