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Londonite
Londonite

Alexandrite
Alexandrite



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Londonite
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Alexandrite

Londonite Vs Alexandrite

1 Astrology
1.1 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
1.2 Color
White, Colorless, Yellow
Green
1.3 Streak
White
Not Available
1.4 For which Rashi?
Not Available
Scorpio
1.5 Planet
Not Available
Venus
1.6 Element of Planets
Not Available
Earth
1.7 How to Wear?
1.7.1 Finger
Not Available
Not Available
1.7.2 Ring Metal
Not Available
Not Available
1.8 Energy
Not Available
Projective, Receptive
1.9 Deities
Not Available
Not Available
1.10 Not to wear with
Not Available
Not Available
1.11 Powers
Not Available
Love
1.12 Birthstone
1.12.1 Planetary
Not Available
Not Available
1.12.2 Talisman
Not Available
Not Available
2 Physical Properties
2.1 Tenacity
Not Available
Not Available
2.2 Solubility
Not Available
Not Available
2.3 Durability
Not Available
Not Available
2.4 Specific Gravity
3.343.69-3.81
Amber
1 7.18
2.5 Fracture
ConchoidalAnthony et al, Handbook of mineralogy (2001), ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal
Not Available
2.6 Cleavage
None
1,1 ; 3,2.
2.7 Mohs Hardness
Not Available8.5
Amber
2 10
2.8 Chemical Composition
(Cs,K,Rb)Al 4Be 4(B,Be) 12O 28Anthony et al , Handbook of mineralogy (2001)
BeAl 2 O 4
3 Optical Properties
3.1 Luster
Vitreous
Vitreous
3.2 Pleochroism
Not Available
Not Available
3.3 Dispersion
NANA
Fluorite
0.007 1
3.4 Transparency
Transparent
Transparent, Transparent to nearly opaque
3.5 Refractive Index
Not Available1.739-1.770
Agate Opal
1 3.25
3.6 Optic Character
Not Available
Biaxial/+
3.7 Crystal System
Not Available
Orthorhombic
3.8 Birefringence
Not Available0.007-0.010
Achroite
0 0.296
3.9 Clarity
Transparent
Transparent
4 Benefits
4.1 Physical
4.1.1 Neurological
Not Available
Not Available
4.1.2 Cardiovascular
Not Available
Not Available
4.1.3 Respiratory
Not Available
Not Available
4.1.4 Reproductive
Not Available
Not Available
4.1.5 Digestive
Not Available
Not Available
4.2 Psychology
Not Available
Not Available
4.3 Healing
Not Available
Not Available
4.4 Qualities Associated
Not Available
Not Available

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.