Origin
Ethiopia, Afghanistan, China, Australia, Origins: Brazil (major source); also found in USA, Germany, France, UK, Finland, Norway, Sweden, Namibia, Zaire, China and Australia.
USA, Madagascar, India, Sri Lanka, Burma, Australia, Italy, Brazil
Color
Brown, Green, White, Colorless, Yellow, Blue, gray, pink, Greenish
Blue, Green, Brownish, Greenish, Colorless, gray
Specific Gravity
2.98-3.10
3.20-3.26
Fracture
Sub-Conchoidal, Irregular/uneven, Uneven, Conchoidal
Splintery
Cleavage
[100] Perfect, [110] Good, [011] Distinct
{010} perfect
Chemical Composition
(Li,Na)Al(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
Luster
Vitreous, Pearly
Vitreous, Subadamantine, Silky
Pleochroism
weak to none
Colourless to pale brown to yellow
Transparency
-
Transparent, Translucent
Refractive Index
1.578-1.646
1.653-1.685
Optic Character
Biaxial/+
-
Crystal System
Triclinic
Orthorhombic
Birefringence
0.020-0.030
0.020-0.022
Clarity
TransparentUlrich Henn and Claudio C. Milisenda
Transparent
Neurological
Enhances mental clarity and focus
-
Respiratory
Excellent
Good
Reproductive
Supports reproductive health
-
Psychology
Peace
Creativity
Healing
Emotional healing
Emotional healing
Qualities Associated
Peace
Creativity
Amblygonite Vs Sillimanite Fracture
Fracture is an important parameter when you compare Amblygonite and Sillimanite Physical Properties. It is necessary to understand the significance of these properties, before you compare Amblygonite Vs Sillimanite 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 Amblygonite is Sub-Conchoidal, Irregular/uneven, Uneven and Conchoidal. Sillimanite fracture is Splintery.
Amblygonite Vs Sillimanite Luster
A primary knowledge about Amblygonite vs Sillimanite 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 exhibits Vitreous and Pearly luster. Sillimanite, on other hand, exhibits Vitreous, Subadamantine and Silky luster.