Vivianite Vs Andalusite
Origin
Southern and central Africa
Spain, Brazil, USA, Sri Lanka, Burma, Origins: Spain, Burma. Discovered in Andalusia (Spain)
Color
Blue, Green, Colorless
Brown, pink, Violet, Yellow, Green, White, gray, Colorless, Red
Specific Gravity
2.64-2.70
3.05-3.21
Fracture
-
Uneven, Subconchoidal, Splintery
Cleavage
{010} Perfect
Good on {110}, poor on {100}
Chemical Composition
Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.
Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
Luster
Vitreous, Pearly
Vitreous, Greasy
Pleochroism
Anomalous plechroism is strong with colours deep blue/pale yellowish green/yellowish green.Michael OâDonoghue
strongly trichroic
Transparency
Transparent
Transparent, Translucent
Refractive Index
1.560-1.640
1.627-1.650
Crystal System
-
Orthorhombic
Birefringence
0.054-0.075
0.009-0.010
Clarity
Transparent
Transparent
Neurological
Enhances mental clarity and focus
Enhances mental clarity and focus
Cardiovascular
-
Supports heart health
Respiratory
Good
Excellent
Psychology
Hope
Perception
Healing
Emotional healing
Physical healing
Qualities Associated
Transformation
Self-Realization
Vivianite Vs Andalusite Fracture
Fracture is an important parameter when you compare Vivianite and Andalusite Physical Properties. It is necessary to understand the significance of these properties, before you compare Vivianite 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.
Vivianite Vs Andalusite Luster
A primary knowledge about Vivianite 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. Vivianite exhibits Vitreous and Pearly luster. Andalusite, on other hand, exhibits Vitreous and Greasy luster.