Sillimanite

Iolite

Sillimanite Vs Iolite

Sillimanite

Iolite

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Astrology

Origin

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

Brazil, USA, Canada, Madagascar, Sri Lanka, India, Burma

Color

Blue, Green, Brownish, Greenish, Colorless, gray

Blue, Violet, Yellow, Grey

Streak

White

For which Rashi?

Libra, Sagittarius, Taurus

Planet

Jupiter

Element of Planets

Water

Energy

How to Wear?

Finger

Ring Metal

Deities

Not to wear with

Powers

Birthstone

Planetary

Talisman

Physical Properties

Tenacity

Tough

Solubility

Durability

Specific Gravity

3.20-3.262.6-2.7

1 7.18

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Fracture

Splintery

Cleavage

{010} perfect

3,1

Mohs Hardness

6-7.57-7.5

2 10

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Chemical Composition

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

Mg₂Al₄Si₅O₁₈

Optical Properties

Luster

Vitreous, Subadamantine, Silky

Vitreous

Pleochroism

Colourless to pale brown to yellow

Dispersion

0.020.02

0.005 1

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Transparency

Transparent, Translucent

Transparent, Translucent, Transparent to translucent

Refractive Index

1.653-1.6851.52-1.56

1 3.25

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Optic Character

Crystal System

Orthorhombic

Birefringence

0.020-0.022-9999

0 0.296

👆🏻

Clarity

Transparent

Transparent to translucent

Benefits

Physical

Neurological

Enhances mental clarity and focus

Cardiovascular

Supports heart health

Respiratory

Good

Excellent

Reproductive

Digestive

Supports digestive health

Psychology

Creativity

Intuition

Healing

Emotional healing

Qualities Associated

Creativity

Intuition

Sillimanite Vs Iolite Fracture

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

Compare Blue Gemstones

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Sillimanite Vs Iolite Luster

A primary knowledge about Sillimanite vs Iolite 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. Iolite, on other hand, exhibits Vitreous luster.