Sillimanite

Lazulite

Sillimanite Vs Lazulite

Sillimanite

Lazulite

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Astrology

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

Streak

White

For which Rashi?

Gemini, Sagittarius

Planet

Jupiter

Element of Planets

Energy

How to Wear?

Finger

Ring Metal

Deities

Not to wear with

Powers

Birthstone

Planetary

Talisman

Physical Properties

Tenacity

Tough

Solubility

Durability

Specific Gravity

3.20-3.263.04-3.17

1 7.18

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Fracture

Splintery

Uneven

Cleavage

{010} perfect

{001} Indistinct, {???} Indistinct

Mohs Hardness

6-7.55.5

2 10

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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

Optical Properties

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

Dispersion

0.020.01

0.005 1

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Transparency

Transparent, Translucent

Refractive Index

1.653-1.6851.604-1.646

1 3.25

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Optic Character

Crystal System

Orthorhombic

monoclinic

Birefringence

0.020-0.0220.031-0.036

0 0.296

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Clarity

Transparent

Benefits

Physical

Neurological

Balances digestive system and reduces bloating

Cardiovascular

Respiratory

Good

Excellent

Reproductive

Digestive

Supports digestive health

Psychology

Creativity

Clarity

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.

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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.