Gahnite

Sillimanite

Gahnite Vs Sillimanite

Gahnite

Sillimanite

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Astrology

Origin

Australia

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

Color

Blue, Green, Greenish, Black

Blue, Green, Brownish, Greenish, Colorless, gray

Streak

Grey, gray

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

Solubility

Durability

Specific Gravity

4.00-4.623.20-3.26

1 7.18

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Fracture

Conchoidal, Uneven

Splintery

Cleavage

Indistinct parting on [111]

{010} perfect

Mohs Hardness

7.5-86-7.5

2 10

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Chemical Composition

ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)

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

Optical Properties

Luster

Vitreous

Vitreous, Subadamantine, Silky

Pleochroism

Colourless to pale brown to yellow

Dispersion

0.030.02

0.005 1

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Transparency

Transparent, Translucent

Refractive Index

1.790-1.8181.653-1.685

1 3.25

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Optic Character

Crystal System

cubic

Orthorhombic

Birefringence

-99990.020-0.022

0 0.296

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Clarity

TransparentUlrich Henn and Claudio C. Milisenda

Transparent

Benefits

Physical

Neurological

Enhances mental clarity and focus

Cardiovascular

Respiratory

Aids in digestion and soothes the stomach

Good

Reproductive

Digestive

Psychology

Protection

Creativity

Healing

Emotional healing

Qualities Associated

Harmony

Creativity

Gahnite Vs Sillimanite Fracture

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

Compare Blue Gemstones

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Gahnite Vs Sillimanite Luster

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