Gedrite Vs Tantalite
Origin
Southern and central Africa
Australia, Brazil, Canada, Colombia, Madagascar, Zimbabwe
Color
Brown, Green, gray, White
Brown
Streak
gray, White
Brownish, Red, Black
Specific Gravity
3.15-3.259
5.2
Fracture
-
Subconchoidal, Conchoidal
Cleavage
Gedrite Magnesiogedrite , Comments: Dark gray cleavage fragment of magnesiogedrite (gedrite). , Location: Bamble, Telemark, Norway. , Scale: See Image.
Good in one direction
Mohs Hardness
5.5-6
6-6.5
Chemical Composition
(Mg,Fe2+ ) 2[(Mg,Fe2+ ) 3Al 2](Si 6Al 2)O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)
(Fe,Mn)Ta 2O 6Walter Schumann , Gemstones of the world (2001) More from other references
Pleochroism
Weak to moderate
-
Transparency
Transparent
TransparentWalter Schumann
Refractive Index
1.625-1.718
2.190-2.457
Crystal System
Orthorhombic Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P nma
Orthorhombic
Birefringence
-9999
0.083
Clarity
Transparent
TransparentWalter Schumann
Psychology
Focus
Strength
Healing
-
Emotional healing
Qualities Associated
Protection
Balance
Gedrite Vs Tantalite Fracture
Fracture is an important parameter when you compare Gedrite and Tantalite Physical Properties. It is necessary to understand the significance of these properties, before you compare Gedrite Vs Tantalite 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. Tantalite fracture is Subconchoidal and Conchoidal.
Gedrite Vs Tantalite Luster
A primary knowledge about Gedrite vs Tantalite 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. Gedrite exhibits Vitreous luster. Tantalite, on other hand, exhibits Resinous luster.