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