Blue John

Cordierite

Blue John Vs Cordierite

Blue John

Cordierite

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Astrology

Origin

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

Color

White, Colorless, Blue, Red, Green, Yellow, Violet

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

Brittle

Solubility

Durability

Specific Gravity

3.00-3.252.57-2.66

1 7.18

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Fracture

Subconchoidal, Conchoidal

Cleavage

Perfect

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

Mohs Hardness

-99997-7.5

2 10

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Chemical Composition

CaF 2Michael OâDonoghue , Gems, Sixth Edition (2006)

Mg2Al4Si5O18

Optical Properties

Luster

Greasy, Vitreous

Pleochroism

X = pale yellow

Dispersion

0.020.01

0.005 1

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Transparency

Transparent

Refractive Index

1.432-1.436-9999

1 3.25

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Optic Character

Crystal System

Orthorhombic

Birefringence

-9999-9999

0 0.296

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Clarity

Transparent

Benefits

Physical

Neurological

Enhances mental clarity and focus

Supports healthy digestion

Cardiovascular

Supports heart health

Respiratory

Excellent

Good

Reproductive

Digestive

Psychology

Harmony

Intuition

Healing

Emotional healing

Qualities Associated

Mental Clarity

Psychic Abilities

Blue John Vs Cordierite Fracture

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

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Blue John Vs Cordierite Luster

A primary knowledge about Blue John 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. Cordierite, on other hand, exhibits Greasy and Vitreous luster.