Origin
Canada, USA, Brazil, Italy, Mozambique, Zimbabwe, Russia, Burma, Australia
Brazil, USA, Madagascar, Sri Lanka, Burma, Thailand, Cambodia, Afghanistan, Russia
Color
Colorless, gray, Yellow, White
Blue, Violet, Colorless, Red, Green, Brown
For which Rashi?
Not Available
Sagittarius, Scorpio, Sagittarius, Scorpio, Sagittarius, Scorpio
Planet
Not Available
Pluto
Element of Planets
Not Available
Not Available
Finger
Not Available
Not Available
Ring Metal
Not Available
Not Available
Energy
Not Available
Projective
Deities
Not Available
Hephaestus
Not to wear with
Not Available
Not Available
Powers
Not Available
Money
Planetary
Not Available
Not Available
Talisman
Not Available
Not Available
Tenacity
Brittle
Not Available
Solubility
insoluble
none
Durability
Not Available
Not Available
Specific Gravity
2.40
3.64-3.66
Fracture
Subconchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Brittle, Conchoidal
Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)
Cleavage
Perfect on {001}, poor on {201} with 38.5° angle between the two
None, but may exhibit slight parting
Chemical Composition
LiAlSi 4O 10Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
MgAl2O4
Luster
Vitreous, Pearly
Vitreous
Pleochroism
AbsentWalter Schumann
Absent
Transparency
Gemmological Tables (2004) More from other references
Transparent, Translucent, Transparent to translucent
Refractive Index
1.502-1.523
1.73
Optic Character
Not Available
Not Available
Crystal System
monoclinic
Isometric
Birefringence
0.012-0.016
Not Available
Clarity
TransparentUlrich Henn and Claudio C. Milisenda
TransparentUlrich Henn and Claudio C. Milisenda
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
Petalite Vs Spinel Fracture
Fracture is an important parameter when you compare Petalite and Spinel Physical Properties. It is necessary to understand the significance of these properties, before you compare Petalite Vs Spinel 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 Brittle, Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references and Subconchoidal. Spinel fracture is Conchoidal, ConchoidalArthur Thomas, Gemstones (2009) and Uneven.
Petalite Vs Spinel Luster
A primary knowledge about Petalite vs Spinel 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 Pearly and Vitreous luster. Spinel, on other hand, exhibits Vitreous luster.