Vivianite Vs Sugilite
Origin
Southern and central Africa
Canada, Southern and central Africa, Italy, Australia, India
Color
Blue, Green, Colorless
Violet, Brownish, Yellow, Reddish, Pale pink
Planet
-
Mercury, Jupiter
Element of Planets
-
Water
Specific Gravity
2.64-2.70
2.69-2.79
Cleavage
{010} Perfect
Poor on {0001}
Mohs Hardness
-9999
5.5-6.5
Chemical Composition
Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.
KNa 2(Fe3+ ,Mn3+ ,Al) 2Li 3Si 12O 30Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Luster
Vitreous, Pearly
Vitreous
Pleochroism
Anomalous plechroism is strong with colours deep blue/pale yellowish green/yellowish green.Michael OâDonoghue
Weak
Transparency
Transparent
Translucent
Refractive Index
1.560-1.640
1.607-1.612
Crystal System
-
Hexagonal
Birefringence
0.054-0.075
0.003
Clarity
Transparent
Translucent
Neurological
Enhances mental clarity and focus
Enhances mental clarity and focus
Respiratory
Good
Excellent
Psychology
Hope
Spirituality
Healing
Emotional healing
Emotional healing
Qualities Associated
Transformation
Spiritual Protection
Vivianite Vs Sugilite Fracture
Fracture is an important parameter when you compare Vivianite and Sugilite Physical Properties. It is necessary to understand the significance of these properties, before you compare Vivianite Vs Sugilite 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. Sugilite fracture is Conchoidal.
Vivianite Vs Sugilite Luster
A primary knowledge about Vivianite vs Sugilite 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. Sugilite, on other hand, exhibits Vitreous luster.