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