Sillimanite

Bytownite

Sillimanite Vs Bytownite

Sillimanite

Bytownite

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Astrology

Origin

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

Canada, Southern and central Africa, Australia

Color

Blue, Green, Brownish, Greenish, Colorless, gray

Colorless, White, 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

Tough

Brittle

Solubility

Durability

Specific Gravity

3.20-3.262.72-2.75

1 7.18

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Fracture

Splintery

Uneven

Cleavage

{010} perfect

Perfect on [001], good on [010], imperfect on [110]

Mohs Hardness

6-7.56-6.5

2 10

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Chemical Composition

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

Ca(70-90%)Na(30-10%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)

Optical Properties

Luster

Vitreous, Subadamantine, Silky

Vitreous, Pearly

Pleochroism

Colourless to pale brown to yellow

colorless.

Dispersion

0.020.01

0.005 1

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Transparency

Transparent, Translucent

Transparent

Refractive Index

1.653-1.6851.561-1.583

1 3.25

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Optic Character

Crystal System

Orthorhombic

Triclinic

Birefringence

0.020-0.0220.010-0.011

0 0.296

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Clarity

Transparent

Benefits

Physical

Neurological

Cardiovascular

Respiratory

Good

Poor

Reproductive

Digestive

Psychology

Creativity

Clarity

Healing

Emotional healing

Qualities Associated

Creativity

Clarity

Sillimanite Vs Bytownite Fracture

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

Compare Blue Gemstones

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Sillimanite Vs Bytownite Luster

A primary knowledge about Sillimanite vs Bytownite 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. Bytownite, on other hand, exhibits Vitreous and Pearly luster.