Origin
USA, Madagascar, India, Sri Lanka, Burma, Australia, Italy, Brazil
USA, Mexico, Brazil, Switzerland, Sri Lanka, Burma, Madagascar, Origins: USA, Germany, Japan
Color
Blue, Green, Brownish, Greenish, Colorless, gray
Yellow, Brown, Colorless, White, gray, Brownish
Specific Gravity
3.20-3.26
2.97-3.03
Fracture
Splintery
Uneven, ConchoidalWalter Schumann, Conchoidal
Cleavage
{010} perfect
{001} Poor
Chemical Composition
Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
CaB 2(SiO 4) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Luster
Vitreous, Subadamantine, Silky
Vitreous, Greasy
Pleochroism
Colourless to pale brown to yellow
Weak: pale yellow yellow
Transparency
Transparent, Translucent
-
Refractive Index
1.653-1.685
1.627-1.639
Optic Character
-
Biaxial/+
Crystal System
Orthorhombic
Orthorhombic
Birefringence
0.020-0.022
0.006
Clarity
Transparent
TransparentUlrich Henn and Claudio C. Milisenda
Neurological
-
Enhances mental clarity and focus
Cardiovascular
-
Supports heart health
Psychology
Creativity
Spiritual Awareness
Healing
Emotional healing
Emotional healing
Qualities Associated
Creativity
Spiritual Awakening
Sillimanite Vs Danburite Fracture
Fracture is an important parameter when you compare Sillimanite and Danburite Physical Properties. It is necessary to understand the significance of these properties, before you compare Sillimanite Vs Danburite 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 Sillimanite is Splintery. Danburite fracture is Uneven, ConchoidalWalter Schumann and Conchoidal.
Sillimanite Vs Danburite Luster
A primary knowledge about Sillimanite vs Danburite 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. Sillimanite exhibits Vitreous, Subadamantine and Silky luster. Danburite, on other hand, exhibits Vitreous and Greasy luster.