Dumortierite Vs Onyx
Origin
Southern and central Africa, violet, blue, violet, blue
Not Available
Color
Blue, Violet, Brown, White, Blue, Brown, Violet, Greenish, pink
White
Streak
White
Not Available
For which Rashi?
Leo, Sagittarius, Leo, Sagittarius, Leo, Sagittarius
Capricorn
Element of Planets
Water
Not Available
Finger
Not Available
Not Available
Ring Metal
Not Available
Not Available
Energy
Receptive
Projective
Not to wear with
Not Available
Not Available
Powers
Healing
Protection
Planetary
Not Available
Not Available
Talisman
Not Available
Capricorn
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.26-3.41
2.55-2.70
Fracture
Fibrous, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references
Not Available
Cleavage
Distinct on {100}, poor on {110}; parting on {001}
Indiscernible
Mohs Hardness
7-8.5
6.5-7
Chemical Composition
AlAl6O3BSi3O18
SiO2
Pleochroism
Strong; X = deep blue or violet; Y = yellow to red-violet or nearly colorless; Z = colorless or very pale blue
Not Available
Dispersion
None
Not Available
Transparency
Translucent, Translucent to opaque
Translucent, Opaque, Translucent to opaque
Refractive Index
1.669-1.723
1.530-1.543
Optic Character
Not Available
Not Available
Crystal System
Orthorhombic
Trigonal
Birefringence
0.011-0.037
Not Available
Clarity
Translucent
OpaqueHerve Nicolas Lazzarelli
Neurological
Not Available
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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
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Healing
Not Available
Not Available
Qualities Associated
Not Available
Not Available
Dumortierite Vs Onyx Fracture
Fracture is an important parameter when you compare Dumortierite and Onyx Physical Properties. It is necessary to understand the significance of these properties, before you compare Dumortierite Vs Onyx 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 Dumortierite is ConchoidalWalter Schumann, Fibrous and Gemstones of the world (2001) More from other references.
Dumortierite Vs Onyx Luster
A primary knowledge about Dumortierite vs Onyx 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. Dumortierite exhibits Vitreous luster. Onyx, on other hand, exhibits Vitreous luster.