Black Opal Vs Howlite
Origin
Australia
Southern and central Africa
Color
White, Colorless, Blue, Red, Green, Yellow, Violet
Blue, Colorless, White
Streak
Not Available
White
For which Rashi?
Not Available
Gemini, Virgo
Planet
Not Available
Not Available
Element of Planets
Not Available
Earth
Energy
Not Available
Not Available
Finger
Not Available
Not Available
Ring Metal
Not Available
Not Available
Deities
Not Available
Quan Yin
Not to wear with
Not Available
Not Available
Powers
Not Available
Not Available
Planetary
Not Available
Not Available
Talisman
Not Available
Not Available
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
1.97-2.22
2.45-2.58
Fracture
Conchoidal
Conchoidal
Cleavage
Not Available
None
Mohs Hardness
6-6.5
3-3.5
Chemical Composition
SiO 2 + H 2OUlrich Henn and Claudio C.
Ca 2B 5SiO 9(OH) 5Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Luster
Not Available
Vitreous
Pleochroism
Not Available
Not Available
Dispersion
None
Not Available
Transparency
Transparent, Translucent
Not Available
Refractive Index
1.370-1.470
1.583-1.608
Optic Character
Not Available
Not Available
Crystal System
Not Available
monoclinic
Birefringence
Not Available
0.019
Clarity
Transparent
Not Available
Neurological
Not Available
Not Available
Cardiovascular
Not Available
Not Available
Respiratory
Not Available
Not Available
Reproductive
Not Available
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Digestive
Not Available
Not Available
Psychology
Not Available
Not Available
Healing
Not Available
Not Available
Qualities Associated
Not Available
Not Available
Black Opal Vs Howlite Fracture
Fracture is an important parameter when you compare Black Opal and Howlite Physical Properties. It is necessary to understand the significance of these properties, before you compare Black Opal Vs Howlite 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 Black Opal is Conchoidal. Howlite fracture is Conchoidal.
Black Opal Vs Howlite Luster
A primary knowledge about Black Opal vs Howlite 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. Howlite, on other hand, exhibits Vitreous luster.
