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