Origin
Australia, Southern and central Africa, green, brown, Australia, France, green, brown, Australia, France
Brazil, Madagascar, Zambia, Sri Lanka, Burma, Russia, USA, Afghanistan
Color
Green, Colorless, gray, Yellow, White
Green, Blue, Yellow, Red, Brown, White, Colorless, Blue, Red, Green, Yellow, pink
For which Rashi?
Libra
Libra
Element of Planets
Earth
Water
Energy
Receptive
Projective
Finger
Not Available
Not Available
Ring Metal
Not Available
Not Available
Not to wear with
Not Available
Not Available
Powers
Not Available
Love, Courage
Planetary
Not Available
Not Available
Talisman
Not Available
Not Available
Tenacity
Brittle
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.80-2.95
2.85-3.35
Fracture
Uneven, Yellow, White, UnevenWalter Schumann, Gemstones of the world (2001) More from other references, Brittle, Metallic
Uneven, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009)
Cleavage
Distinct on [001]
Indistinct
Mohs Hardness
6-6.5
7-7.5
Chemical Composition
Ca2Al2Si3O12(OH)
Tourmaline is a series of several different minerals with unique chemical formulas. See The chemical formula of Tourmaline for details.
Pleochroism
AbsentWalter Schumann
typically moderate to strong
Transparency
Translucent
Transparent, Translucent, Transparent to opaque
Refractive Index
1.611-1.673
1.614-1.666
Optic Character
Not Available
Not Available
Crystal System
Orthorhombic
Trigonal
Birefringence
0.021-0.033
0.014-0.040
Clarity
TranslucentHerve Nicolas Lazzarelli
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
Prehnite Vs Tourmaline Fracture
Fracture is an important parameter when you compare Prehnite and Tourmaline Physical Properties. It is necessary to understand the significance of these properties, before you compare Prehnite Vs Tourmaline 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 Prehnite is Uneven, Yellow, White, UnevenWalter Schumann, Gemstones of the world (2001) More from other references, Brittle and Metallic. Tourmaline fracture is Uneven, Conchoidal, ConchoidalArthur Thomas and Gemstones (2009).
Prehnite Vs Tourmaline Luster
A primary knowledge about Prehnite vs Tourmaline 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. Prehnite exhibits Vitreous luster. Tourmaline, on other hand, exhibits Vitreous luster.
