Arfvedsonite

Sillimanite

Arfvedsonite Vs Sillimanite

Arfvedsonite

Sillimanite

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Astrology

Origin

Canada, Russia

USA, Madagascar, India, Sri Lanka, Burma, Australia, Italy, Brazil

Color

Black, Green, gray

Blue, Green, Brownish, Greenish, Colorless, gray

Streak

gray, Green

White

For which Rashi?

Planet

Element of Planets

Energy

How to Wear?

Finger

Ring Metal

Deities

Not to wear with

Powers

Birthstone

Planetary

Talisman

Physical Properties

Tenacity

Brittle

Tough

Solubility

Durability

Specific Gravity

3.3-3.53.20-3.26

1 7.18

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Fracture

Uneven

Splintery

Cleavage

Perfect on [110]

{010} perfect

Mohs Hardness

5-66-7.5

2 10

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Chemical Composition

NaNa2(Fe++4Fe+++)Si8O22(OH)2

Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)

Optical Properties

Luster

Vitreous

Vitreous, Subadamantine, Silky

Pleochroism

Strong: Blue-greens

Colourless to pale brown to yellow

Dispersion

0.020.02

0.005 1

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Transparency

Transparent, Translucent

Refractive Index

1.652-1.6991.653-1.685

1 3.25

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Optic Character

Crystal System

monoclinic

Orthorhombic

Birefringence

-99990.020-0.022

0 0.296

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Clarity

Transparent

Benefits

Physical

Neurological

Promotes psychic abilities and spiritual growth

Cardiovascular

Respiratory

Excellent

Good

Reproductive

Digestive

Psychology

Insight

Creativity

Healing

Emotional healing

Qualities Associated

Manifestation

Creativity

Arfvedsonite Vs Sillimanite Fracture

Fracture is an important parameter when you compare Arfvedsonite and Sillimanite Physical Properties. It is necessary to understand the significance of these properties, before you compare Arfvedsonite 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 Arfvedsonite is Uneven. Sillimanite fracture is Splintery.

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Arfvedsonite Vs Sillimanite Luster

A primary knowledge about Arfvedsonite 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. Arfvedsonite exhibits Vitreous luster. Sillimanite, on other hand, exhibits Vitreous, Subadamantine and Silky luster.