Sillimanite

Cordierite

Sillimanite Vs Cordierite

Sillimanite

Cordierite

Add ⊕

Astrology

Origin

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

Australia, Brazil, Burma, Canada, India, Madagascar, Sri Lanka, Tanzania

Color

Blue, Green, Brownish, Greenish, Colorless, gray

Blue, Violet, Greenish, Brown, Colorless, Yellow, 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

3.20-3.262.57-2.66

1 7.18

👆🏻

Fracture

Splintery

Subconchoidal, Conchoidal

Cleavage

{010} perfect

Fair on {100}, poor on {001} and {010}

Mohs Hardness

6-7.57-7.5

2 10

👆🏻

Chemical Composition

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

Mg2Al4Si5O18

Optical Properties

Luster

Vitreous, Subadamantine, Silky

Greasy, Vitreous

Pleochroism

Colourless to pale brown to yellow

X = pale yellow

Dispersion

0.020.01

0.005 1

👆🏻

Transparency

Transparent, Translucent

Refractive Index

1.653-1.685-9999

1 3.25

👆🏻

Optic Character

Crystal System

Orthorhombic

Birefringence

0.020-0.022-9999

0 0.296

👆🏻

Clarity

Transparent

Benefits

Physical

Neurological

Supports healthy digestion

Cardiovascular

Respiratory

Good

Reproductive

Digestive

Psychology

Creativity

Intuition

Healing

Emotional healing

Qualities Associated

Creativity

Psychic Abilities

Sillimanite Vs Cordierite Fracture

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

Compare Blue Gemstones

Sillimanite Vs Tortoiseshell

Sillimanite Vs Verdite

Sillimanite Vs Violane

Sillimanite Vs Cordierite Luster

A primary knowledge about Sillimanite vs Cordierite 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. Cordierite, on other hand, exhibits Greasy and Vitreous luster.