Andalusite Vs Colemanite
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
Colorless, gray, White
Specific Gravity
3.05-3.21
2.40-2.42
Fracture
Uneven, Subconchoidal, Splintery
-
Cleavage
Good on {110}, poor on {100}
{010} Perfect, {001} Distinct
Chemical Composition
Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
Ca 2B 6O 11 · 5H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Luster
Vitreous, Greasy
Vitreous
Pleochroism
strongly trichroic
-
Transparency
Transparent, Translucent
Transparent
Refractive Index
1.627-1.650
1.584-1.615
Crystal System
Orthorhombic
Monoclinic Prismatic H-M Symbol (2/m) Space Group: P 21/a
Birefringence
0.009-0.010
0.028-0.030
Clarity
Transparent
Transparent
Neurological
Enhances mental clarity and focus
-
Cardiovascular
Supports heart health
-
Respiratory
Excellent
Good
Psychology
Perception
Imagination
Healing
Physical healing
Emotional healing
Qualities Associated
Self-Realization
Harmony
Andalusite Vs Colemanite Fracture
Fracture is an important parameter when you compare Andalusite and Colemanite Physical Properties. It is necessary to understand the significance of these properties, before you compare Andalusite Vs Colemanite 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 Colemanite Luster
A primary knowledge about Andalusite vs Colemanite 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. Colemanite, on other hand, exhibits Vitreous luster.