Origin
Brazil, Madagascar, Zambia, Sri Lanka, Burma, Russia, USA, Afghanistan
Austria, Spain, Russia, Canada, Australia
Color
Green, Blue, Yellow, Red, Brown, White, Colorless, Blue, Red, Green, Yellow, pink
Colorless, Brownish, Yellow, Green, gray, White
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
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Powers
Love, Courage
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Planetary
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Talisman
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Tenacity
Not Available
Brittle
Solubility
Not Available
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Durability
Not Available
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Specific Gravity
2.85-3.35
3.7-3.9
Fracture
Uneven, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009)
Conchoidal, Brittle
Cleavage
Indistinct
{001} perfect; {111} imperfect, may exhibit parting on , {011}
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.
MgOMichael OâDonoghue , Gems, Sixth Edition (2006)
Pleochroism
typically moderate to strong
Not Available
Transparency
Transparent, Translucent, Transparent to opaque
TransparentWalter Schumann, Gemstones of the world (2001) More from other references
Refractive Index
1.614-1.666
1.735-1.738
Optic Character
Not Available
Not Available
Crystal System
Trigonal
Isometric
Birefringence
0.014-0.040
Not Available
Clarity
Transparent
TransparentWalter Schumann
Neurological
Not Available
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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 Periclase Fracture
Fracture is an important parameter when you compare Tourmaline and Periclase Physical Properties. It is necessary to understand the significance of these properties, before you compare Tourmaline Vs Periclase 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. Periclase fracture is Brittle and Conchoidal.
Tourmaline Vs Periclase Luster
A primary knowledge about Tourmaline vs Periclase 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. Periclase, on other hand, exhibits Vitreous luster.