Andalusite Vs Covellite
Origin
Spain, Brazil, USA, Sri Lanka, Burma, Origins: Spain, Burma. Discovered in Andalusia (Spain)
Mexico
Color
Brown, pink, Violet, Yellow, Green, White, gray, Colorless, Red
Blue, Black
Streak
White
Grey, Black, gray
Specific Gravity
3.05-3.21
4.6-4.76
Fracture
Uneven, Subconchoidal, Splintery
-
Cleavage
Good on {110}, poor on {100}
Perfect on {0001}
Chemical Composition
Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
CuSMichael OâDonoghue , Gems, Sixth edition (2006) More from other references
Luster
Vitreous, Greasy
Resinous
Pleochroism
strongly trichroic
Marked
Transparency
Transparent, Translucent
OpaqueAnthony et al
Refractive Index
1.627-1.650
1.45-2.62
Crystal System
Orthorhombic
Hexagonal
Birefringence
0.009-0.010
-9999
Clarity
Transparent
OpaqueAnthony et al
Neurological
Enhances mental clarity and focus
Enhances mental clarity and focus
Cardiovascular
Supports heart health
Supports heart health
Respiratory
Excellent
Good
Psychology
Perception
Transformation
Healing
Physical healing
Emotional healing
Qualities Associated
Self-Realization
Manifestation
Andalusite Vs Covellite Fracture
Fracture is an important parameter when you compare Andalusite and Covellite Physical Properties. It is necessary to understand the significance of these properties, before you compare Andalusite Vs Covellite 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.
Andalusite Vs Covellite Luster
A primary knowledge about Andalusite vs Covellite 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. Covellite, on other hand, exhibits Resinous luster.