Andalusite

Polyhalite

Andalusite Vs Polyhalite

Andalusite

Polyhalite

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Astrology

Origin

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

Austria

Color

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

Colorless, White, Red, gray, pink

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

Brittle

Solubility

Soluble

Durability

Specific Gravity

3.05-3.212.78

1 7.18

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Fracture

Uneven, Subconchoidal, Splintery

Conchoidal

Cleavage

Good on {110}, poor on {100}

Perfect on {10 1 }; parting on {010}

Mohs Hardness

7.53.5

2 10

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Chemical Composition

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

K2Ca2Mg(SO4)4·2H2O

Optical Properties

Luster

Vitreous, Greasy

Vitreous, Resinous

Pleochroism

strongly trichroic

Dispersion

0.020.02

0.005 1

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Transparency

Transparent, Translucent

Refractive Index

1.627-1.6501.546-1.548

1 3.25

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Optic Character

Crystal System

Orthorhombic

Triclinic

Birefringence

0.009-0.0100.021

0 0.296

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Clarity

Transparent

Benefits

Physical

Neurological

Enhances mental clarity and focus

Cardiovascular

Supports heart health

Respiratory

Excellent

Good

Reproductive

Digestive

Psychology

Perception

Healing

Physical healing

Qualities Associated

Self-Realization

Emotional Healing

Andalusite Vs Polyhalite Fracture

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

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Andalusite Vs Polyhalite Luster

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