Grossular Vs Dumortierite
Origin
Sri Lanka, India, Brazil
Southern and central Africa
Color
Green, Brown, Colorless, gray, Yellow
Blue, Violet, Brown, White, Greenish, pink
Streak
Brownish, White
White
For which Rashi?
-
Leo, Sagittarius
Element of Planets
-
Water
Specific Gravity
3.55-3.73
3.26-3.41
Fracture
Conchoidal, Uneven
Fibrous, ConchoidalWalter Schumann
Cleavage
none
Distinct on {100}, poor on {110}; parting on {001}
Mohs Hardness
7-7.5
7-8.5
Chemical Composition
Ca 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
AlAl6O3BSi3O18
Luster
Greasy, Vitreous
Vitreous
Pleochroism
None
Strong; X = deep blue or violet; Y = yellow to red-violet or nearly colorless; Z = colorless or very pale blue
Transparency
-
Translucent, Translucent to opaque
Refractive Index
1.730-1.760
1.669-1.723
Crystal System
cubic
Orthorhombic
Birefringence
0.020
0.011-0.037
Clarity
TransparentUlrich Henn and Claudio C. Milisenda
Translucent
Neurological
-
Enhances mental clarity and focus
Reproductive
Helps in digestion and alleviates indigestion
-
Psychology
Abundance
Patience
Healing
Physical healing
Emotional healing
Qualities Associated
Abundance
Patience
Grossular Vs Dumortierite Fracture
Fracture is an important parameter when you compare Grossular and Dumortierite Physical Properties. It is necessary to understand the significance of these properties, before you compare Grossular 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. Fracture observed in Grossular is Conchoidal and Uneven. Dumortierite fracture is Fibrous and ConchoidalWalter Schumann.
Grossular Vs Dumortierite Luster
A primary knowledge about Grossular 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. Grossular exhibits Greasy and Vitreous luster. Dumortierite, on other hand, exhibits Vitreous luster.