Andalusite Vs Astrophyllite
Origin
Spain, Brazil, USA, Sri Lanka, Burma, Origins: Spain, Burma. Discovered in Andalusia (Spain)
Canada, Russia
Color
Brown, pink, Violet, Yellow, Green, White, gray, Colorless, Red
Brown, Yellow, Greenish, Brownish, Red
Streak
White
Brown, White
Specific Gravity
3.05-3.21
3.2-3.4
Fracture
Uneven, Subconchoidal, Splintery
Uneven
Cleavage
Good on {110}, poor on {100}
Perfect on [001] imperfect on [100]
Chemical Composition
Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
(K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)
Luster
Vitreous, Greasy
Greasy, Pearly
Pleochroism
strongly trichroic
Strong: X= deep red-orange Y= orange-yellow Z= lemon-yellow
Transparency
Transparent, Translucent
Translucent
Refractive Index
1.627-1.650
1.678-1.758
Crystal System
Orthorhombic
Triclinic
Birefringence
0.009-0.010
0.050
Clarity
Transparent
Translucent
Neurological
Enhances mental clarity and focus
Enhances mental clarity and focus
Cardiovascular
Supports heart health
Supports heart health
Respiratory
Excellent
Excellent
Psychology
Perception
Self-Reflection
Healing
Physical healing
Spiritual healing
Qualities Associated
Self-Realization
Self-Reflection
Andalusite Vs Astrophyllite Fracture
Fracture is an important parameter when you compare Andalusite and Astrophyllite Physical Properties. It is necessary to understand the significance of these properties, before you compare Andalusite Vs Astrophyllite 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. Astrophyllite fracture is Uneven.
Andalusite Vs Astrophyllite Luster
A primary knowledge about Andalusite vs Astrophyllite 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. Astrophyllite, on other hand, exhibits Greasy and Pearly luster.