Origin
Southern and central Africa
Ethiopia, Afghanistan, China, Australia, Origins: Brazil (major source); also found in USA, Germany, France, UK, Finland, Norway, Sweden, Namibia, Zaire, China and Australia.
Color
White, Colorless, Blue, Red, Green, Yellow, Violet
Brown, Green, White, Colorless, Yellow, Blue, gray, pink, Greenish
Specific Gravity
1.98-2.50
2.98-3.10
Fracture
Conchoidal
Sub-Conchoidal, Irregular/uneven, Uneven, Conchoidal
Cleavage
None
[100] Perfect, [110] Good, [011] Distinct
Chemical Composition
SiO 2 · nH 2OWalter Schumann , Gemstones of the world (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
1.37-1.52
1.578-1.646
Optic Character
-
Biaxial/+
Crystal System
-
Triclinic
Birefringence
-9999
0.020-0.030
Clarity
Translucent
TransparentUlrich Henn and Claudio C. Milisenda
Neurological
-
Enhances mental clarity and focus
Respiratory
Good
Excellent
Reproductive
-
Supports reproductive health
Psychology
Creativity
Peace
Healing
Emotional healing
Emotional healing
Qualities Associated
Creativity
Peace
Common Opal Vs Amblygonite Fracture
Fracture is an important parameter when you compare Common Opal and Amblygonite Physical Properties. It is necessary to understand the significance of these properties, before you compare Common Opal 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 Common Opal is Conchoidal. Amblygonite fracture is Sub-Conchoidal, Irregular/uneven, Uneven and Conchoidal.
Common Opal Vs Amblygonite Luster
A primary knowledge about Common Opal 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.