Origin
USA
Ethiopia, Afghanistan, China, Australia, Origins: Brazil (major source); also found in USA, Germany, France, UK, Finland, Norway, Sweden, Namibia, Zaire, China and Australia.
Color
Brown, Red, Black, Brownish
Brown, Green, White, Colorless, Yellow, Blue, gray, pink, Greenish
Streak
Reddish, Brown
White
Specific Gravity
5.05-5.22
2.98-3.10
Fracture
Uneven
Sub-Conchoidal, Irregular/uneven, Uneven, Conchoidal
Cleavage
None
[100] Perfect, [110] Good, [011] Distinct
Chemical Composition
(Zn,Mn2+ ,Fe2+ )(Fe3+ ,Mn3+ ) 2O 4Anthony et al , Handbook of mineralogy (2001)
(Li,Na)Al(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
Luster
-
Vitreous, Pearly
Pleochroism
-
weak to none
Transparency
Translucent
-
Refractive Index
-9999
1.578-1.646
Optic Character
-
Biaxial/+
Crystal System
Isometric Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: F d3m
Triclinic
Birefringence
-9999
0.020-0.030
Clarity
Translucent
TransparentUlrich Henn and Claudio C. Milisenda
Neurological
-
Enhances mental clarity and focus
Reproductive
-
Supports reproductive health
Psychology
Creativity
Peace
Healing
-
Emotional healing
Qualities Associated
Grounding
Peace
Franklinite Vs Amblygonite Fracture
Fracture is an important parameter when you compare Franklinite and Amblygonite Physical Properties. It is necessary to understand the significance of these properties, before you compare Franklinite Vs Amblygonite 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 Franklinite is Uneven. Amblygonite fracture is Sub-Conchoidal, Irregular/uneven, Uneven and Conchoidal.
Franklinite Vs Amblygonite Luster
A primary knowledge about Franklinite vs Amblygonite 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. Amblygonite, on other hand, exhibits Vitreous and Pearly luster.