Andalusite Vs Common Opal
Origin
Spain, Brazil, USA, Sri Lanka, Burma, Origins: Spain, Burma. Discovered in Andalusia (Spain)
Southern and central Africa
Color
Brown, pink, Violet, Yellow, Green, White, gray, Colorless, Red
White, Colorless, Blue, Red, Green, Yellow, Violet
Specific Gravity
3.05-3.21
1.98-2.50
Fracture
Uneven, Subconchoidal, Splintery
Conchoidal
Cleavage
Good on {110}, poor on {100}
None
Mohs Hardness
7.5
5.5-6.5
Chemical Composition
Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)
Luster
Vitreous, Greasy
-
Pleochroism
strongly trichroic
-
Transparency
Transparent, Translucent
Translucent
Refractive Index
1.627-1.650
1.37-1.52
Crystal System
Orthorhombic
-
Birefringence
0.009-0.010
-9999
Clarity
Transparent
Translucent
Neurological
Enhances mental clarity and focus
-
Cardiovascular
Supports heart health
-
Respiratory
Excellent
Good
Psychology
Perception
Creativity
Healing
Physical healing
Emotional healing
Qualities Associated
Self-Realization
Creativity
Andalusite Vs Common Opal Fracture
Fracture is an important parameter when you compare Andalusite and Common Opal Physical Properties. It is necessary to understand the significance of these properties, before you compare Andalusite Vs Common Opal 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 Andalusite is Uneven, Subconchoidal and Splintery. Common Opal fracture is Conchoidal.
Andalusite Vs Common Opal Luster
A primary knowledge about Andalusite vs Common Opal 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. Andalusite exhibits Vitreous and Greasy luster.