Origin
Canada, USA, Brazil, Italy, Mozambique, Zimbabwe, Russia, Burma, Australia
Afghanistan, Brazil, Madagascar, Mozambique, Southern and central Africa, Russia, Sri Lanka
Color
Colorless, gray, Yellow, White
White, Colorless, Blue, Red, Green, Yellow, Violet
Specific Gravity
2.40
3.01-3.06
Fracture
Subconchoidal, ConchoidalWalter Schumann, Conchoidal
Conchoidal
Cleavage
Perfect on {001}, poor on {201} with 38.5° angle between the two
Indiscernible
Mohs Hardness
6-6.5
7-7.5
Chemical Composition
LiAlSi 4O 10Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.
Luster
Vitreous, Pearly
-
Pleochroism
-
Strong: dark red pinkish-redHerve Nicolas Lazzarelli
Transparency
-
Transparent, Translucent
Refractive Index
1.502-1.523
1.614-1.666
Crystal System
monoclinic
-
Birefringence
0.012-0.016
0.014-0.040
Clarity
TransparentUlrich Henn and Claudio C. Milisenda
Transparent
Respiratory
Good
Excellent
Psychology
Calmness
Passion
Healing
Emotional healing
Emotional healing
Qualities Associated
Peace
Passion
Petalite Vs Rubellite Fracture
Fracture is an important parameter when you compare Petalite and Rubellite Physical Properties. It is necessary to understand the significance of these properties, before you compare Petalite Vs Rubellite 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 Petalite is Subconchoidal, ConchoidalWalter Schumann and Conchoidal. Rubellite fracture is Conchoidal.
Petalite Vs Rubellite Luster
A primary knowledge about Petalite vs Rubellite 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. Petalite exhibits Vitreous and Pearly luster.