Blue John Vs Andalusite
Origin
-
Spain, Brazil, USA, Sri Lanka, Burma, Origins: Spain, Burma. Discovered in Andalusia (Spain)
Color
White, Colorless, Blue, Red, Green, Yellow, Violet
Brown, pink, Violet, Yellow, Green, White, gray, Colorless, Red
Specific Gravity
3.00-3.25
3.05-3.21
Fracture
-
Uneven, Subconchoidal, Splintery
Cleavage
Perfect
Good on {110}, poor on {100}
Chemical Composition
CaF 2Michael OâDonoghue , Gems, Sixth Edition (2006)
Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
Luster
-
Vitreous, Greasy
Pleochroism
-
strongly trichroic
Transparency
Transparent
Transparent, Translucent
Refractive Index
1.432-1.436
1.627-1.650
Crystal System
-
Orthorhombic
Birefringence
-9999
0.009-0.010
Clarity
Transparent
Transparent
Neurological
Enhances mental clarity and focus
Enhances mental clarity and focus
Cardiovascular
Supports heart health
Supports heart health
Respiratory
Excellent
Excellent
Psychology
Harmony
Perception
Healing
Emotional healing
Physical healing
Qualities Associated
Mental Clarity
Self-Realization
Blue John Vs Andalusite Fracture
Fracture is an important parameter when you compare Blue John and Andalusite Physical Properties. It is necessary to understand the significance of these properties, before you compare Blue John Vs Andalusite 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. Andalusite fracture is Uneven, Subconchoidal and Splintery.
Blue John Vs Andalusite Luster
A primary knowledge about Blue John vs Andalusite 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, on other hand, exhibits Vitreous and Greasy luster.