Origin
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
  
Mexico
  
Color
Green
  
Colorless, White, Colorless, Greenish, Brown, White, Colorless, Greenish, Brown, White, Colorless, Greenish, Brown
  
Streak
Not Available
  
White
  
For which Rashi?
Scorpio
  
Not Available
  
Planet
Venus
  
Not Available
  
Element of Planets
Earth
  
Not Available
  
How to Wear?
  
  
Finger
Not Available
  
Not Available
  
Ring Metal
Not Available
  
Not Available
  
Energy
Projective, Receptive
  
Not Available
  
Deities
Not Available
  
Not Available
  
Not to wear with
Not Available
  
Not Available
  
Powers
Love
  
Not Available
  
Birthstone
  
  
Planetary
Not Available
  
Not Available
  
Talisman
Not Available
  
Not Available
  
Tenacity
Not Available
  
Flexible
  
Solubility
Not Available
  
Soluble
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3.69-3.81
  
2.20-2.40
  
Fracture
Not Available
  
Conchoidal, Splintery, Fibrous, UnevenArthur Thomas, Gemstones (2009)
  
Cleavage
1,1 ; 3,2.
  
Perfect on {010}, distinct on {100}
  
Mohs Hardness
8.5
  
2
  
Chemical Composition
BeAl 2 O 4
  
CaSO 4 -2(H 2O)Arthur Thomas , Gemstones (2009)
  
Luster
Vitreous
  
Vitreous, Silky, Pearly, Waxy
  
Pleochroism
Not Available
  
None
  
Dispersion
Not Available
  
Not Available
  
Transparency
Transparent, Transparent to nearly opaque
  
Transparent, Translucent
  
Refractive Index
1.739-1.770
  
1.521-1.531
  
Optic Character
Biaxial/+
  
Not Available
  
Crystal System
Orthorhombic
  
monoclinic
  
Birefringence
0.007-0.010
  
0.010
  
Clarity
Transparent
  
Transparent
  
Physical
  
  
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
  
Alexandrite Vs Gypsum Fracture
Fracture is an important parameter when you compare Alexandrite and Gypsum Physical Properties. It is necessary to understand the significance of these properties, before you compare Alexandrite Vs Gypsum 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. Gypsum fracture is Conchoidal, Fibrous, Gemstones (2009), Splintery and UnevenArthur Thomas.
Alexandrite Vs Gypsum Luster
A primary knowledge about Alexandrite vs Gypsum 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. Alexandrite exhibits Vitreous luster. Gypsum, on other hand, exhibits Pearly, Silky, Vitreous and Waxy luster.