Origin
Spain, Brazil, USA, Sri Lanka, Burma, Origins: Spain, Burma. Discovered in Andalusia (Spain)
Southern and central Africa
Color
Brown, pink, Violet, Yellow, Green, White, gray, Colorless, Red
Brown, Green, gray, White
Specific Gravity
3.05-3.21
3.15-3.259
Fracture
Uneven, Subconchoidal, Splintery
-
Cleavage
Good on {110}, poor on {100}
Gedrite Magnesiogedrite , Comments: Dark gray cleavage fragment of magnesiogedrite (gedrite). , Location: Bamble, Telemark, Norway. , Scale: See Image.
Chemical Composition
Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
(Mg,Fe2+ ) 2[(Mg,Fe2+ ) 3Al 2](Si 6Al 2)O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)
Luster
Vitreous, Greasy
Vitreous
Pleochroism
strongly trichroic
Weak to moderate
Transparency
Transparent, Translucent
Transparent
Refractive Index
1.627-1.650
1.625-1.718
Crystal System
Orthorhombic
Orthorhombic Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P nma
Birefringence
0.009-0.010
-9999
Clarity
Transparent
Transparent
Neurological
Enhances mental clarity and focus
-
Cardiovascular
Supports heart health
-
Psychology
Perception
Focus
Healing
Physical healing
-
Qualities Associated
Self-Realization
Protection
Andalusite Vs Gedrite Fracture
Fracture is an important parameter when you compare Andalusite and Gedrite Physical Properties. It is necessary to understand the significance of these properties, before you compare Andalusite Vs Gedrite 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.
Andalusite Vs Gedrite Luster
A primary knowledge about Andalusite vs Gedrite 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. Gedrite, on other hand, exhibits Vitreous luster.