Hercynite Vs Dravite
Origin
Not Available
Southern and central Africa
Color
Yellow, Black
White, Colorless, Blue, Red, Green, Yellow, Violet, Black, Green, Red, Blue, White
For which Rashi?
Not Available
Not Available
Planet
Not Available
Not Available
Element of Planets
Not Available
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Finger
Not Available
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Ring Metal
Not Available
Not Available
Energy
Not Available
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Deities
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Not to wear with
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Powers
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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
Not Available
Durability
Not Available
Not Available
Specific Gravity
4.39
3.03-3.18
Fracture
ConchoidalGemdat.org, Uneven
Uneven, Uneven, Irregular, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle
Cleavage
{111} Indistinct, {111} Indistinct, {111} Indistinct
{???} Indistinct
Mohs Hardness
7.5-8
7-7.5
Chemical Composition
Fe2+ Al 2O 4Gemdat.org , Management Team (2012)
Na(Mg 3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
Pleochroism
Not Available
Very strong: pale yellow colorless
Transparency
Translucent
Transparent
Refractive Index
1.80-1.83
1.614-1.666
Optic Character
Not Available
Not Available
Crystal System
Isometric Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: F d3m
Trigonal Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m
Birefringence
Not Available
0.014-0.032
Clarity
Translucent
Transparent
Neurological
Not Available
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Cardiovascular
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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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Hercynite Vs Dravite Fracture
Fracture is an important parameter when you compare Hercynite and Dravite Physical Properties. It is necessary to understand the significance of these properties, before you compare Hercynite Vs Dravite 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 Hercynite is ConchoidalGemdat.org and Uneven. Dravite fracture is Brittle, Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Irregular, Uneven and Uneven.
Hercynite Vs Dravite Luster
A primary knowledge about Hercynite vs Dravite 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. Hercynite exhibits Vitreous luster. Dravite, on other hand, exhibits Vitreous luster.