Sillimanite Vs Lazulite
Origin
USA, Madagascar, India, Sri Lanka, Burma, Australia, Italy, Brazil
Brazil, Southern and central Africa
Color
Blue, Green, Brownish, Greenish, Colorless, gray
Blue, Green, Black
For which Rashi?
-
Gemini, Sagittarius
Specific Gravity
3.20-3.26
3.04-3.17
Fracture
Splintery
Uneven
Cleavage
{010} perfect
{001} Indistinct, {???} Indistinct
Chemical Composition
Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
(Mg,Fe)Al 2(PO 4) 2(OH) 2Arthur Thomas , Gemstones (2009) More from other references
Luster
Vitreous, Subadamantine, Silky
-
Pleochroism
Colourless to pale brown to yellow
Transparent crystals show a strong pleochroism: colorless light blue dark (violet) blueHerve Nicolas Lazzarelli
Transparency
Transparent, Translucent
Transparent, Translucent
Refractive Index
1.653-1.685
1.604-1.646
Crystal System
Orthorhombic
monoclinic
Birefringence
0.020-0.022
0.031-0.036
Clarity
Transparent
Transparent
Neurological
-
Balances digestive system and reduces bloating
Respiratory
Good
Excellent
Digestive
-
Supports digestive health
Psychology
Creativity
Clarity
Healing
Emotional healing
Emotional healing
Qualities Associated
Creativity
Psychic Abilities
Sillimanite Vs Lazulite Fracture
Fracture is an important parameter when you compare Sillimanite and Lazulite Physical Properties. It is necessary to understand the significance of these properties, before you compare Sillimanite Vs Lazulite 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. Lazulite fracture is Uneven.
Sillimanite Vs Lazulite Luster
A primary knowledge about Sillimanite vs Lazulite 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.