Blue John

Andalusite

Blue John Vs Andalusite

Blue John

Andalusite

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Astrology

Origin

Spain, Brazil, USA, Sri Lanka, Burma, Origins: Spain, Burma. Discovered in Andalusia (Spain)

Color

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

Brown, pink, Violet, Yellow, Green, White, gray, Colorless, Red

Streak

White

For which Rashi?

Planet

Venus

Element of Planets

Energy

How to Wear?

Finger

Ring Metal

Deities

Not to wear with

Powers

Birthstone

Planetary

Talisman

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

3.00-3.253.05-3.21

1 7.18

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Fracture

Uneven, Subconchoidal, Splintery

Cleavage

Perfect

Good on {110}, poor on {100}

Mohs Hardness

-99997.5

2 10

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Chemical Composition

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

Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references

Optical Properties

Luster

Vitreous, Greasy

Pleochroism

strongly trichroic

Dispersion

0.020.02

0.005 1

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Transparency

Transparent

Transparent, Translucent

Refractive Index

1.432-1.4361.627-1.650

1 3.25

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Optic Character

Crystal System

Orthorhombic

Birefringence

-99990.009-0.010

0 0.296

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Clarity

Transparent

Benefits

Physical

Neurological

Enhances mental clarity and focus

Cardiovascular

Supports heart health

Respiratory

Excellent

Reproductive

Digestive

Psychology

Harmony

Perception

Healing

Emotional healing

Physical healing

Qualities Associated

Mental Clarity

Self-Realization

Blue John Vs Andalusite Fracture

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

Compare Blue Gemstones

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Blue John Vs Andalusite Luster

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