Andalusite

Black Opal

Andalusite Vs Black Opal

Andalusite

Black Opal

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Astrology

Origin

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

Australia

Color

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

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

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

3.05-3.211.97-2.22

1 7.18

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Fracture

Uneven, Subconchoidal, Splintery

Conchoidal

Cleavage

Good on {110}, poor on {100}

None

Mohs Hardness

7.56-6.5

2 10

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Chemical Composition

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

SiO 2 + H 2OUlrich Henn and Claudio C.

Optical Properties

Luster

Vitreous, Greasy

Pleochroism

strongly trichroic

Dispersion

0.020.01

0.005 1

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Transparency

Transparent, Translucent

Refractive Index

1.627-1.6501.370-1.470

1 3.25

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Optic Character

Crystal System

Orthorhombic

Birefringence

0.009-0.010-9999

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

Perception

Transformation

Healing

Physical healing

Emotional healing

Qualities Associated

Self-Realization

Mystery

Andalusite Vs Black Opal Fracture

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

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Andalusite Vs Black Opal Luster

A primary knowledge about Andalusite vs Black Opal 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.