Ettringite Vs Andalusite
Origin
Southern and central Africa
Spain, Brazil, USA, Sri Lanka, Burma, Origins: Spain, Burma. Discovered in Andalusia (Spain)
Color
Colorless, Yellow, White
Brown, pink, Violet, Yellow, Green, White, gray, Colorless, Red
Solubility
Partially soluble in water
-
Specific Gravity
1.77
3.05-3.21
Fracture
-
Uneven, Subconchoidal, Splintery
Cleavage
Perfect on {10 1 0}
Good on {110}, poor on {100}
Chemical Composition
Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
Luster
Vitreous
Vitreous, Greasy
Pleochroism
-
strongly trichroic
Transparency
Transparent, Translucent
Transparent, Translucent
Refractive Index
1.470-1.491
1.627-1.650
Crystal System
Trigonal
Orthorhombic
Birefringence
0.021
0.009-0.010
Clarity
Transparent
Transparent
Neurological
-
Enhances mental clarity and focus
Cardiovascular
-
Supports heart health
Psychology
Adaptability
Perception
Healing
Emotional healing
Physical healing
Qualities Associated
Balance
Self-Realization
Ettringite Vs Andalusite Fracture
Fracture is an important parameter when you compare Ettringite and Andalusite Physical Properties. It is necessary to understand the significance of these properties, before you compare Ettringite 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.
Ettringite Vs Andalusite Luster
A primary knowledge about Ettringite 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. Ettringite exhibits Vitreous luster. Andalusite, on other hand, exhibits Vitreous and Greasy luster.