Londonite Vs Alexandrite
Origin
Madagascar
Russia, Brazil, Tanzania, Madagascar, Zambia, Sri Lanka, Burma, India, Color: color change, from bluish green (daylight) to purple, red or brown (incandescent light), Hardness: 8, Refractive index: 1.74 1.77, Density: 3.68 3.80, Chemical composition: BeAl2O4, Crystal structure: orthorhombic, Origins: Russia, Brazil, Tanzania, Madagascar, Zambia, Sri Lanka, Burma
Color
White, Colorless, Yellow
Green
Streak
White
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For which Rashi?
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Scorpio
Planet
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Venus
Element of Planets
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Earth
Finger
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Ring Metal
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Energy
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Projective, Receptive
Deities
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Not to wear with
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Powers
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Love
Planetary
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Talisman
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Tenacity
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Solubility
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Durability
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Specific Gravity
3.34
3.69-3.81
Fracture
ConchoidalAnthony et al, Handbook of mineralogy (2001), ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal
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Mohs Hardness
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8.5
Chemical Composition
(Cs,K,Rb)Al 4Be 4(B,Be) 12O 28Anthony et al , Handbook of mineralogy (2001)
BeAl 2 O 4
Pleochroism
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Dispersion
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Transparency
Transparent
Transparent, Transparent to nearly opaque
Refractive Index
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1.739-1.770
Optic Character
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Biaxial/+
Crystal System
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Orthorhombic
Birefringence
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0.007-0.010
Clarity
Transparent
Transparent
Neurological
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Cardiovascular
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Respiratory
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Reproductive
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Digestive
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Psychology
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Healing
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Qualities Associated
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Londonite Vs Alexandrite Fracture
Fracture is an important parameter when you compare Londonite and Alexandrite Physical Properties. It is necessary to understand the significance of these properties, before you compare Londonite Vs Alexandrite 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 Londonite is Brittle, Conchoidal, ConchoidalAnthony et al, ConchoidalAnthony et al, Handbook of mineralogy (2001) and Handbook of mineralogy (2001).
Londonite Vs Alexandrite Luster
A primary knowledge about Londonite vs Alexandrite 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. Londonite exhibits Vitreous luster. Alexandrite, on other hand, exhibits Vitreous luster.