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