Poudretteite

Sillimanite

Poudretteite Vs Sillimanite

Poudretteite

Sillimanite

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Astrology

Origin

Canada, Southern and central Africa

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

Color

Violet, Colorless, pink

Blue, Green, Brownish, Greenish, Colorless, gray

Streak

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

2.51-2.533.20-3.26

1 7.18

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Fracture

Conchoidal, Splintery

Splintery

Cleavage

None

{010} perfect

Mohs Hardness

56-7.5

2 10

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Chemical Composition

KNa 2B 3Si 12O 30Michael OâDonoghue , Gems, Sixth Edition (2006)

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

Optical Properties

Luster

Vitreous

Vitreous, Subadamantine, Silky

Pleochroism

Colorless

Colourless to pale brown to yellow

Dispersion

0.020.02

0.005 1

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Transparency

Transparent, Translucent

Refractive Index

1.511-1.5321.653-1.685

1 3.25

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Optic Character

Crystal System

Hexagonal

Orthorhombic

Birefringence

0.0210.020-0.022

0 0.296

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Clarity

TransparentUlrich Henn and Claudio C. Milisenda

Transparent

Benefits

Physical

Neurological

Cardiovascular

Respiratory

Good

Reproductive

Digestive

Psychology

Creativity

Healing

Emotional healing

Qualities Associated

Love

Creativity

Poudretteite Vs Sillimanite Fracture

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

Compare Violet Gemstones

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Poudretteite Vs Sillimanite Luster

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