Origin
Canada, USA, Brazil, Italy, Mozambique, Zimbabwe, Russia, Burma, Australia
Ethiopia
Color
Colorless, gray, Yellow, White
Yellow, White, Red, Brown, Blue
For which Rashi?
Not Available
Cancer, Libra, Scorpio, Cancer, Libra, Scorpio, Cancer, Libra, Scorpio
Planet
Not Available
Mercury
Element of Planets
Not Available
Earth, Air, Water
Energy
Not Available
Projective, Receptive
Finger
Not Available
Not Available
Ring Metal
Not Available
Not Available
Deities
Not Available
Cupid
Not to wear with
Not Available
Not Available
Powers
Not Available
Astral Projection, Psychicism
Planetary
Not Available
Not Available
Talisman
Not Available
Not Available
Tenacity
Brittle
BrittleWalter Schumann
Solubility
insoluble
hot salt water
Durability
Not Available
Not Available
Specific Gravity
2.40
1.98-2.25
Fracture
Subconchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Brittle, Conchoidal
Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references, Brittle
Cleavage
Perfect on {001}, poor on {201} with 38.5° angle between the two
None
Mohs Hardness
6-6.5
5-6.5
Chemical Composition
LiAlSi 4O 10Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
SiO2 · nH2O
Luster
Vitreous, Pearly
Vitreous, Pearly
Pleochroism
AbsentWalter Schumann
None
Transparency
Gemmological Tables (2004) More from other references
Transparent, Translucent, Transparent to translucent
Refractive Index
1.502-1.523
1.37-1.52
Optic Character
Not Available
Not Available
Crystal System
monoclinic
Trigonal
Birefringence
0.012-0.016
Not Available
Clarity
TransparentUlrich Henn and Claudio C. Milisenda
Transparent
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 Opal Fracture
Fracture is an important parameter when you compare Petalite and Opal Physical Properties. It is necessary to understand the significance of these properties, before you compare Petalite Vs Opal 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, Gemstones of the world (2001) More from other references, Brittle and Conchoidal. Opal fracture is Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references and Brittle.
Petalite Vs Opal Luster
A primary knowledge about Petalite vs Opal 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. Opal, on other hand, exhibits Vitreous and Pearly luster.
