Andalusite Vs Riebeckite
Origin
Spain, Brazil, USA, Sri Lanka, Burma, Origins: Spain, Burma. Discovered in Andalusia (Spain)
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Color
Brown, pink, Violet, Yellow, Green, White, gray, Colorless, Red
Black, Blue, Yellow, Green
Streak
White
Grey, Greenish, Brown
Specific Gravity
3.05-3.21
3.28-3.44
Fracture
Uneven, Subconchoidal, Splintery
Uneven, Splintery
Cleavage
Good on {110}, poor on {100}
Perfect on {110}, intersecting at 56° and 124°; partings on {100} and {010}
Mohs Hardness
7.5
5.0-6.0
Chemical Composition
Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
Na2Fe2+3Fe3+2Si8O22(OH)2
Luster
Vitreous, Greasy
Vitreous, Silky
Pleochroism
strongly trichroic
X = blue
Transparency
Transparent, Translucent
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Refractive Index
1.627-1.650
1.680-1.698
Crystal System
Orthorhombic
monoclinic
Birefringence
0.009-0.010
0.005-0.008
Neurological
Enhances mental clarity and focus
Enhances mental clarity and focus
Cardiovascular
Supports heart health
Supports heart health
Respiratory
Excellent
Good
Psychology
Perception
Empowerment
Healing
Physical healing
Emotional healing
Qualities Associated
Self-Realization
Clear Thinking
Andalusite Vs Riebeckite Fracture
Fracture is an important parameter when you compare Andalusite and Riebeckite Physical Properties. It is necessary to understand the significance of these properties, before you compare Andalusite Vs Riebeckite 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 Andalusite is Uneven, Subconchoidal and Splintery. Riebeckite fracture is Uneven and Splintery.
Andalusite Vs Riebeckite Luster
A primary knowledge about Andalusite vs Riebeckite 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. Andalusite exhibits Vitreous and Greasy luster. Riebeckite, on other hand, exhibits Vitreous and Silky luster.