Origin
Brazil, Madagascar, Zambia, Sri Lanka, Burma, Russia, USA, Afghanistan
Canada, Russia
Color
Green, Blue, Yellow, Red, Brown, White, Colorless, Blue, Red, Green, Yellow, pink
Brown, Yellow, Greenish, Brown, Yellow, Greenish, Brown, Brownish, Red, Yellow
Streak
White
Brown, White, Brown, White
For which Rashi?
Libra
Not Available
Planet
Venus, Mars
Not Available
Element of Planets
Water
Not Available
Energy
Projective
Not Available
Finger
Not Available
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Ring Metal
Not Available
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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
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
2.85-3.35
3.2-3.4
Fracture
Uneven, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009)
Uneven, Brittle, Metallic
Cleavage
Indistinct
Perfect on [001] imperfect on [100]
Chemical Composition
Tourmaline is a series of several different minerals with unique chemical formulas. See The chemical formula of Tourmaline for details.
(K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)
Luster
Vitreous
Greasy, Pearly
Pleochroism
typically moderate to strong
Strong: X= deep red-orange Y= orange-yellow Z= lemon-yellow
Transparency
Transparent, Translucent, Transparent to opaque
Translucent
Refractive Index
1.614-1.666
1.678-1.758
Optic Character
Not Available
Not Available
Crystal System
Trigonal
Triclinic
Birefringence
0.014-0.040
0.050
Clarity
Transparent
Translucent
Neurological
Not Available
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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
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Qualities Associated
Not Available
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Tourmaline Vs Astrophyllite Fracture
Fracture is an important parameter when you compare Tourmaline and Astrophyllite Physical Properties. It is necessary to understand the significance of these properties, before you compare Tourmaline Vs Astrophyllite 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 Uneven, Conchoidal, ConchoidalArthur Thomas and Gemstones (2009). Astrophyllite fracture is Uneven, Brittle and Metallic.
Tourmaline Vs Astrophyllite Luster
A primary knowledge about Tourmaline vs Astrophyllite 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. Astrophyllite, on other hand, exhibits Greasy and Pearly luster.
