Origin
Brazil, Madagascar, Zambia, Sri Lanka, Burma, Russia, USA, Afghanistan
India
Color
Green, Blue, Yellow, Red, Brown, White, Colorless, Blue, Red, Green, Yellow, pink
Yellow, Greenish, Blue, Brown, Green, gray
For which Rashi?
Libra
Not Available
Planet
Venus, Mars
Not Available
Element of Planets
Water
Not Available
Finger
Not Available
Not Available
Ring Metal
Not Available
Not Available
Energy
Projective
Not Available
Deities
Venus
Not Available
Not to wear with
Not Available
Not Available
Powers
Love, Courage
Not Available
Planetary
Not Available
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Talisman
Not Available
Not Available
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.85-3.35
4.23
Fracture
Uneven, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009)
UnevenAnthony et al, Handbook of mineralogy (2001), UnevenAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal
Cleavage
Indistinct
{111} Distinct
Mohs Hardness
7-7.5
3.5-4
Chemical Composition
Tourmaline is a series of several different minerals with unique chemical formulas. See The chemical formula of Tourmaline for details.
CaMoO 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Luster
Vitreous
Greasy, Subadamantine
Pleochroism
typically moderate to strong
In deeply colored specimens: blue greenAnthony et al
Transparency
Transparent, Translucent, Transparent to opaque
Transparent
Refractive Index
1.614-1.666
1.974-1.984
Optic Character
Not Available
Not Available
Crystal System
Trigonal
Not Available
Birefringence
0.014-0.040
Not Available
Clarity
Transparent
Transparent
Neurological
Not Available
Not Available
Cardiovascular
Not Available
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Respiratory
Not Available
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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
Not Available
Qualities Associated
Not Available
Not Available
Tourmaline Vs Powellite Fracture
Fracture is an important parameter when you compare Tourmaline and Powellite Physical Properties. It is necessary to understand the significance of these properties, before you compare Tourmaline Vs Powellite 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. Powellite fracture is Brittle, Conchoidal, Handbook of mineralogy (2001), Handbook of mineralogy (2001), UnevenAnthony et al and UnevenAnthony et al.
Tourmaline Vs Powellite Luster
A primary knowledge about Tourmaline vs Powellite 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. Powellite, on other hand, exhibits Greasy and Subadamantine luster.