Origin
Spain, Brazil, USA, Sri Lanka, Burma, Color: strongly pleochroic, reddish brown, pink / yellowish green, Hardness: 7 7.5, Refractive index: 1.63 1.65, Density: 3.13 3.21, Chemical composition: Al2SiO5, Crystal structure: orthorhombic, Lustre: vitreous, greasy, Origins: Spain, Burma. Discovered in Andalusia (Spain), the andalusite stone is relatively rare, with big crystals over 10 ct. especially rare. Due to its remarkable pleochroism effect, the stone is highly valued by collectors., brown
Southern and central Africa, violet, blue
Color
Brown, pink, Violet, Yellow, Green, White, gray, Colorless, Red
Blue, Violet, Brown, White, Greenish, pink
For which Rashi?
All
Leo, Sagittarius
Element of Planets
Not Available
Water
Energy
Projective, Receptive
Receptive
Finger
Not Available
Not Available
Ring Metal
Not Available
Not Available
Deities
Not Available
Isis
Not to wear with
Not Available
Not Available
Powers
Not Available
Healing
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
3.05-3.21
3.26-3.41
Fracture
Uneven, Subconchoidal, Splintery, UnevenArthur Thomas, Gemstones (2009)
Fibrous, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references
Cleavage
Good on {110}, poor on {100}
Distinct on {100}, poor on {110}; parting on {001}
Chemical Composition
Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
AlAl6O3BSi3O18
Luster
Vitreous, Greasy
Vitreous
Pleochroism
strongly trichroic
Strong; X = deep blue or violet; Y = yellow to red-violet or nearly colorless; Z = colorless or very pale blue
Transparency
Transparent, Translucent
Translucent, Translucent to opaque
Refractive Index
1.627-1.650
1.669-1.723
Optic Character
Not Available
Not Available
Crystal System
Orthorhombic
Orthorhombic
Birefringence
0.009-0.010
0.011-0.037
Clarity
Transparent
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
Andalusite Vs Dumortierite Fracture
Fracture is an important parameter when you compare Andalusite and Dumortierite Physical Properties. It is necessary to understand the significance of these properties, before you compare Andalusite 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 Andalusite is Uneven, Subconchoidal, Splintery, UnevenArthur Thomas and Gemstones (2009). Dumortierite fracture is Fibrous, ConchoidalWalter Schumann and Gemstones of the world (2001) More from other references.
Andalusite Vs Dumortierite Luster
A primary knowledge about Andalusite 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. Andalusite exhibits Vitreous and Greasy luster. Dumortierite, on other hand, exhibits Vitreous luster.